Four new species of the genus Helina(Diptera:Muscidae) from western Sichuan,China

The present paper described and illustrated four new species of the genus Helina Robineau-Desvoidy,1830 from western Sichuan,China during 1982-1988 years,i.e.Helina quadrata Feng,sp.nov.,H.tuanbaoshanica Feng,sp.nov.,H.pedana Feng,sp.nov,and H.erlangshanna Feng,sp.nov..The type specimens are depsited in the Medical Entomological Collection,Institute of Microbiology and Epidemiology,AMMS,Beijing,China.1 Helina quadrata Feng,sp.nov.(Fig.1)Male: This new species is similar to Helina nigriquadrum Xue et Zhao,1989,but can be distinguished from the latter by the following characters:(1) 7-9 frontal setae situated on the parafrontalial entirely,but the latter 4-5 frontal setae on the lower half;(2) submedian vittae on scutum reaching the scutoscutellar suture,but the latter not reach one;(3) 5th sternite is quadrate in profile,its lateral lobes reduced,but the latter is oblong form,its ones longer;(4) surstyli of male as long as cerci,but the latter longer than cerci apparently.Female: Index of frons is 0.402-0.483,frontal setulae in inward 3-4,frontal setulae in upward 2;ocellar triangle reached frontal premargin;wingal costal spines 3,its longer than cross vein r-m;tibiae of legs brownish yellow wholly;distal 1/3-1/4 of both middle and hind femora brown yellowish;abdomen covered with densely greyish yellow pollen,3rd and 4th tergites each with a pair faintal dark lateral spots,apical part of 5th tergite acutangulately in profile in dorsal view;others characters as this species of male.Holotype♂:Baoxing(Yongfu,1800 m;30°33′N,102°39′E),Sichuan Prov.,China,1983-07-28,collected by Feng Yan;paratypes: 5 ♂♂,3♀♀,Mt.Erlang(Forest Farm,2780 m;29°54′N,102°08′E),Sichuan Prov.,1983-08-20,the collector as holotype.2 Helina tuanbaoshanica Feng,sp.nov.(Fig.2)Male: This new species is similar to Helina bibreviplumosa Xue et Feng,1988,but can be distinguished from the latter by the following characters:(1) submedian vittae on scutum reaching the scutoscutellar suture,but the latter not reach one;(2) mid tibia with 3 P,but the latter with 0 P;(3) lateral lobes on 5th sternite shorter,and its postmargins straightly nearly,but the latter ones longer,and its postmargins obtuse and round;(4) surstyli as long as own broad in lateral view,but the latter ones longer than its width markedly.Female: not capture.Holotype♂: Hanyuan(Mt.Tuanbao,3053 m;29°23′N,102°52′E),Sichuan Prov.,1988-07-10,collected by Feng Yan;paratypes;4♂♂,1984-06-22,collected by Ma Xueqing;3♂♂,1987-06-22,collected by Feng Yan and Li Guangshi,above lacality in Hanyuan(Mt.Jiaoding,3550 m;29°23′N,102°51′E),Sichuan Prov.;1♂,Mt.Erlang(Muyepeng,2800 m;29°53′N,102°10′E),Sichuan Prov.,1985-07-20,same collector as holotype.3 Helina pedana Feng,sp.nov.(Fig.3)Male: This new species is similar to Helina annosa(Zetterstedt,1836),but can be distinguished from the latter by the following characters:(1) eyes sparsely covered with short hairs,but the latter ones densely covered with long of it;(2) subapical of 5th sternite with a pair long and thick spinelike bristles,but the latter without ones;(3) mid part of margins of cerci inward hollowly in posterior view,but the latter ones expanded in arc forms;(4) surstyli of male shorter,and as a crescent in lateral view,but the latter longer,and as a long-plank.Female: not capture.Holotype ♂: Ya′an(Mt.Laoban,800 m;29°59′N,102°57′E),Sichuan Prov.,1984-04-18,collected by Feng Yan.4 Helina erlangshanna Feng,sp.nov.(Fig.4)Male: This new species is similar to Helina guizhenae Feng,1999,but can be distinguished from the latter by the following characters:(1) width of frons about twice to the diameter of frontal ocellus at narrowest part,but the latter as width as ones;(2) antennal arista pubescent,but the latter plumose;(3) fore tibia with 0 P seta on mid part,but the latter with 1 P seta;(4) distal of 5th sternite without a pair long bristles,but the latter with ones;(5) apical of surstyli of male reclinately,but the latter straightly.Female: not capture.Holotype♂: Mt.Erlang(Forest Farm,2700 m;29°54′N,102°08′E),Sichuan Prov.,1984-08-20,collected by Feng Yan;paratype 1♂;same as holotype.