The Froggattimyia-Anagonia Genus Group (Diptera: Tachinidae)
Creators: name: Colless, Donald H.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy

description: Anagonia dayi sp. nov.    
Figs 47–49, 85  
 Types. Holotype male in ANIC no. 29-029226, Black Mtn, ACT, light trap, 8 Jan. 1965, IFBC. Terminalia in tube 129. Paratypes (all males)— Australian Capital Territory: 5 specs. as for holotype, but 17 Feb. 1957, T.t. 30; 6–7 Feb. 1966 T.t. 199; 26 Jan. 1967; 14 Feb. 1967; and 2 Apr. 1968; Black Mtn Peninsula, Canberra, 30 Jan. 1980, H. E. Evans, T.t. 388; Canberra, 13 May 1959, M. F. Day, ex larvae of Gonipterus scutellaris [sic], T.t. 97.— New South Wales: Bald Rock NP, 24 Nov. 1980, G. Daniels, M. A. Schneider, prey of asilid, T.t. 2186 (UQIC).— Queensland: Eidsvold, May–Jun. 1923, Bancroft, T.t. 31.— South Australia: 67 mi E of Ceduna, 3 May 1968, IFBC & MSU, T.t. 317.— Western Australia: 3 specs. 25 W Coolgardie, 27 Oct. 1958, E. F. Riek, T.t. 36, 53, 317; 17 mi SE of Coolgardie, 28 Apr. 1968, IFBC & MSU; 35 mi SSW of Norseman, 32°38'S 121°29'E, 17 Nov. 1969, Key & MSU, T.t. 382.   
 Male. Specimens from the arid region in the general vicinity of the Nullarbor Plain differ somewhat from the remainder and are described separately below, as the western form. Otherwise, generally resembling the pale form of A. rufifacies in colour and chaetotaxy, differing principally as follows:   
 Head. Width 2.9–3.6 mm, mean 3.28 mm; Frw/Hdw 0.2–0.3, mean 0.25; Ivb/Vb-E 1.1–1.4, mean 1.15. Eye bare; reclinate upper orbital bristles discontinued well before level of ocelli (specimens from ACT only); dorsal  1  ⁄ 3 of occiput with at most a few scattered dark setae behind the postocular row; ocellar setae fine or (usually) absent; postocellar bristles 3–6.   
 Thorax. Median dark vitta usually present before and after suture; presutural intra-alar bristles and intrapostalar bristle sometimes fine, occasionally absent on one or (rarely) both sides; apical scutellar bristles more or less horizontal, usually slightly cruciate.   
 Legs. Tibiae pale to mid-brown, contrasting with femora. Hindtibia with Pd1 small, Pd1/Sdd 0.6–0.9, mean 0.76.   
 Wing. Tegula concolorous with basicosta or (usually) the former a little darker.   
 Abdomen. Syntergite 1+2 and tergite 3 without differentiated submedian bristles; sternite 1 with pale brown hairs.   
.  
 Terminalia (Figs 47–49). Surstylus strongly pigmented, with very characteristic shape, expanded on apical  2  ⁄  3  with anteriorly directed sharp tip; with profuse long hairs on both internal and external surfaces and, especially, along posterior margin. Cerci slim, curved in posterior direction, with fairly prominent apical internal teeth.   
  Male— western form . Differs from the normal form as follows: postocellar setae almost always 2 in number; dorsal  1  ⁄  3  of occiput with 2 or more rows of black setae behind the postocular row; apical scutellar setae usually upcurved; scutum often with median dark vitta fine or absent; abdomen usually with a pair of differentiated submedian bristles on tergite 3; sternite 1 with dark setae.   
 Female. The specimens described below are believed to be conspecific with the males, on the basis of a reared pair with identical labelling and presumably from a single batch. Apart from the usual sexual characters, differing from the male in (usually) having a finely developed pair of submedian marginal setae on abdominal tergite 3; also, rather inconspicuous pale hairs on proepisternum and katepisternum, posteroventrally on the anepimeron, and ventrally in the stigmatal area.   
 Terminalia (Fig. 85). Very similar to those of A. lasiophthalma, differing as follows: tergite 6 completely or almost completely divided into roughly triangular hemitergites; sternite 6 with stout triangular median boss posteriorly, but less strongly developed; membrane of tergite 7 with very fine, inconspicuous spicules, but those on tergite 8 coarse, thorn-like.   
 Distribution. The few known specimens have, remarkably, been recorded from all mainland states. The species is presumably to be found wherever there are larvae of eucalypt-defoliating curculionids.   
 Biology. Taken in light traps and one pair reared from larvae of the curculionid Gonipterus scutellatus.   
 Notes. The species is named for my colleague Max Day, whose many contributions to entomology include the timely lodgement of a reared pair of this species. The correlation of the sexes, as so often the case in this genus, would otherwise remain obscure.
description: Published as part of Colless, Donald H., 2012, The Froggattimyia-Anagonia Genus Group (Diptera: Tachinidae), pp. 167-211 in Records of the Australian Museum 64 (3) on pages 196-197, DOI: 10.3853/j.0067-1975.64.2012.1590, http://zenodo.org/record/4684127