18 Miss G. Ricardo on the 



xiv. p. 390 (1914), T. sordidus and T. transversus belong to 

 Group VII., T. truncatus to Group IX., and T. sarpa and 

 T. oplus to the subgenus Therioplectes, or hairy-eyed 

 Group XI. 



Tabanus sordidus, Walker, List Dipt. v. p. 256 (1854). 



Type (female) from New Zealand (presented by Col. 

 Bolton). 



A species bearing some resemblance to Tabanus lati- 

 callosus, Ricardo, but distinguished by the wider forehead 

 and square frontal callus, and by the black broad stripe 

 on the abdomen reaching the apex. Antennae incomplete. 

 Legs blackish. 



Length 17 mm. 



Face blackish with grey tomentum and long pale yellow 

 hairs. Beard more yellow in colour. Palpi reddish yellow 

 with black pubescence, large and stout, ending in an obtuse 

 point, almost the same width throughout. Antennae incom- 

 plete, the first two joints dull reddish with black hairs. 

 Eyes bare. Forehead broad, about four times as long as it 

 is broad anteriorly, covered w r ith yellowish-grey tomentum ; 

 frontal callus blackish brown, almost square, and nearly 

 touching the eyes ; the lineal extension spindle-shaped, on 

 the vertex appears a small black callus with what appear 

 very like three small ocelli, but the species is a genuine 

 Tabanus. Thorax black, denuded. Walker describes it as 

 having three hoary stripes, sides with pale yellow hairs, and 

 black hairs above the wings. Scutellum black. Abdomen 

 tawny, the same colour as the first segment, almost wholly 

 black, the three following segments each with a large 

 blackish square spot not quite reaching the posterior border 

 of segment, the last three segments almost wholly black ; 

 pubescence on dorsum black ; underside tawny black at the 

 extreme apex only. Legs blackish, incomplete, Walker says 

 the posterior tibiae are tawny. Wings grey, tinged with 

 brown on fore border and along all the veins ; no appendix ; 

 veins brown. 



Tabanus truncatus, $ , Walker, in Newman, Zoologist, viii. 

 Appendix lxx. (1851), et List Dipt, v., Suppl. i. pp. 255, 

 451 (1854) ; Hutton, Cat. New Z. Diptera, &c. 20 

 (1881), et Trans. New Z. Inst. p. 13 (1900). 



Mesomyia maoriorum, <$ , Bigot, Mem. Soc. Zool.Fr. v. p. 621 (1892); 

 Ricardo, Ann. & Mag. Nat. Hist. (7) viii. p. 297 (1901). 



Type (female) from New Zealand (Col. Bolton) and others ; 

 also a female from Wellington in the Cockayne Coll. Type 



