receptacle consisting of superposed three cells , 103~113  20~30 m ; the basal cell usually stouter or tapering to the foot , about 1.5 times longer than broad , 38~43  25~30 m ; the subbasal cell slightly longer than the basal cell , about 2 times longer than broad , 43~45  20~23 m ; the third cell slightly narrower than the others of receptacle , about as long as broad or somewhat narrower than long , 20~23  18~20 m . perithecium composed of the stalk cell and the proper perithecium ; the stalk cell somewhat longer than the third cell of receptacle , about 1.5 times longer than broad , 25~30  18~20 m ; the proper perithecium usually straight , ellipsoidal inflated , somewhat darker brown , tapering gradually to the apex , where is usually slightly bent to one side , 90~110  20~35 m . host genera : callicorixa , corixa , cymatia , hesperocorixa , micronecta and sigara ( corixidae , hemiptera ) . distribution : cosmopolitan . specimens examined : cibubur lake , cibubur danau cibubur , jakarta , indonesia , 22 september , 2006 . the habits of this species were reported by thaxter ( 1908 ) , picard ( 1913 , c. italicus ) , spegazzini ( 1918 , c. italicus ) , colla ( 1934 , c. italicus ) , benjamin ( 1973 ) , majewski ( 1973 and 1988 , c. italicus , 1994 ) , sugiyama & hayama ( 1981 , c. italicus ) and santamaria ( 1989 , c. italicus ) . the present specimens are similar to the majority of the thalli described by benjamin and majewski . the specimens described here poses the additional appendiculate cells between the subbasal cell and the third cell , and immediately below the perithecium , as shown in the thalli drawn by majewski ( fig . however , the necks of perithecia are considerably longer in the present materials than in those described by majewski . thalli of this species have always been found on the inferior surface of the host 's abdomen , however the present materials were always found on the inferior margin of the left elytra . receptacle consisting of three superposed cells , 83~91  18~20 m ; the basal cell about 1.5 times longer than broad , broader than the two cells above , 30  20 m ; the sub - basal cell about 2.5 times longer than broad , longer than the others of receptacle , 33~38  13~15 m ; the third cell about 2 times longer than broad , shorter and slender than the others of receptacle , 20~23  10~13 m . appendiculate cells 2 in number , nearly symmetrical , producing appendages , usually branched on third cell of them , up to 175 m long . perithecium composed of the stalk cell and the proper peritheium ; the stalk cell about 2 times longer than broad , as long as third cell of receptacle ; the proper perithecium long and slender , the margins hardly convex below , the tip portion long , slightly bent outward , tapering event1y to the blunt termination , 88~100  10~18 m . host genus : micronecta ( corixidae , hemiptera ) . specimens examined : cibubur lake , cibubur dana cibubur , jakarta , indonesia , 22 september , 2006 , l - y-2161 and 2189 . this species is nearly identical to c. minor ; however , it has a nearly straight habit and a perithecium that is long and slender , hardly convex below , and a long portion of the tip that is bent slightly outward and tapers evenly to a blunt apex . in addition , the length of the stalk cell of perithecium in the present specimens is shorter than those of the specimens described by thaxter . according to the description by thaxter ( 1931 ) , this species varies considerably in size and habit and the thalli always grow on the margin of the left elytra . receptacle consisting of superposed three cells , 93~103  20~25 m ; the basal cell above 1.5 times longer than broad , 35~40  20~25 m ; the subbasal cell about 2 times longer than broad , longer than the other cells of receptacle , 38~43  18~20 m ; the third cell about as long as broad , inflated , 20  20 m . appendiculate cells flattened , two or three , somewhat broader than long , slight constriction ; appendages bearing one to three secondary branchlets on the basal cell , 135~163 m long . perithecium consisting of the stalk cell and the proper perithecium ; the stalk cell somewhat longer than broad or about two times longer than broad , 20~25  13~20 m ; the proper perithecium elliptical , nearly uniform or narrower below , inflated in the middle portion , tapering gradually to the apex , 95~100  20~25 m . host genera : corixa and micronecta ( corixidae , hemiptera ) . specimens examined : cibubur lake , cibubur dana cibubur , jakarta , indonesia , 20 september , 2006 , l - y-2170 and 2187 . this species is closely related to c. corixae ; however , it differs in the following features : 1 ) the form of the thallus is strongly flexed throughout in the present species , while it is straight or somewhat flexed in the previously described species . 2 ) the distal portion of the perithecium has a tapered habit in the present species , while it is truncated in the previously described species . thallus long and slender , hyaline or faintly tinged with brown , abruptly bent or irregularly strongly sigmoid habit . receptacle consisting of superposed three cells , 143~161  20~28 m ; the basal cell usually distinctly stouter , about 2~3 times longer than broad ; the subbasal cell cylindrical , about 3~4 times longer than broad , longer than the others of receptacle , 68~83  20~25 m ; the third cell somewhat narrower than the others , about 2 times longer than broad , 25~35  15~25 m . appendiculate cells 4~6 or rarely 9 in number , slightly broader than long , nearly squarish ; appendages longitudinal and stouter , usually producing the secondary branchlets on the third cell , 150 m long . perithecium composed of the stalk cell and the proper perithecium ; the stalk cell somewhat narrower below , somewhat longer than the third cell of receptacle , about 2~3 times longer than broad , 25~38  13~15 m ; the proper perithecium slightly inflated , the margins subsymmetrically convex , becoming rather darker brown , abruptly recurved tip - portion , the apex blunt or truncate , 90~115  20~30 m . specimens examined : raya bogor , jakarta , indonesia , 20 september , 2006 , l - y-2100 , 2101 , 2102 , 2103 , 2104 , 2105 , 2106 , 2107 , 2108 , 2109 , 2110 , 2111 , 2112 , 2113 and 2114 ; cibubur lake , cibubur dana , cibubur , jakarta , indonesia , 22 september , 2006 , l - y-2148 , 2152 , 2154 , 2155 , 2156 , 2157 , 2160 , 2165 , 2167 , 2171 , 2172 , 2173 , 2184 , 2185 , 2186 , 2195 and 2196 . this species is closely related to c. curvatus , but it is different from the latter due to its abruptly bent or strongly sigmoid habit and the recurved tip - portion of its perithecium . the present species was always collected near the basal portion of the legs and on the inferior surface of the abdomen and thorax of its hosts , but according to thaxter ( 1931 ) , this species was always found on the inferior surface of the margin of the left elytra .
four species of laboulbeniales collected from java island , indonesia between august and september in 2006 are described . 
 these species , which belong to the genus coreomyces and were found on the family corixidae of the order hemiptera , were as follows ; coreomycus corixae thaxter , coreomyces micronectae thaxter and coreomyces orientalis thaxter , which were found on micronecta sedula horvath , and coreomyces recurvatus thaxter , which was found on micronecta sedula horvath and xenocorixa sp . c. corixae thaxter and c. orientalis thaxter were originally found on micronecta , whereas c. recurvatus thaxter was originally found on xenocorixa . 
 all species described herein are new to java island . 
 the specimens were deposited in the biological herbarium , division of science education , college of education , chosun university .