1893.] 33 



the end of the anal nervure ; another blotch on the pobrachial branches, 

 and the postical nervure a little beyond the pobrachial fork, partly 

 opposite the end of the axillar nervure ; and in the ? , a spot on the 

 axillar nervure just beyond its middle, sub-opposite to the pobrachial 

 fork ; exterior to these markings the hair is thinner or scantier, so as to 

 produce the appearance of a narrow, transverse, paler fascia, extending 

 from the subcosta to the anal nervure ; fringes brownish-black, with a 

 whitish gloss on the longer hairs, from opposite the anterior fork to 

 opposite the end of the pr^brachial nervure, the shorter hairs thereabouts 

 remaining hrown-black ; anal-axillar region dilated in the ^ , its nervures 

 in this sex very densely beset with distichous hairs. Last joint in the 

 S tarsus, the last four in the ? tarsus glossed with yellowish-white. 

 Superior <? appendages 2-jointed ; basal joint stout, rounded outwards 

 and above ; 2nd joint twice the length of the former, very slender and 

 small, slightly dilated towards the base, and then roundly falcate, like the 

 / blade of a reaping-hook, pointing inwards and downwards, with the tip 

 p^/ slightly averted. Wing, 3 to 4 mm. long Pericoma, Section V. 



/a — Wing ovate-lanceolate 6. 



6 — (5a) Apex of wing rounded between the cubitus and praebrachial nervure. 



Tenacular spinules of the inferior $ appendages numerous .. 



Pericoma, Section IV. 



a — Apex of wing acute, exactly at the end of the praebrachial nervure. Tena- 

 cular spinules of the inferior $ appendages few (one, two, or three, 

 according to the species). Antennae in $ 14- join ted ; joints one and two 

 very short ; the other twelve joints moniliform, with globular nodules at 

 long intervals, eleven of them with oval-cupuliform verticils of hair, the 



last of these containing the terminal joint '. i^ 



7— (6a) Dorsal hair bristling on every abdominal segment. Ovipositor rostrate, 



horny, exserted Psychoda, Section I. 



a — Dorsal hair bristling on only the 1st abdominal segment. External ? 

 genitalia valvular, short, and obtuse. Inferior $ appendages each with 

 two tenacular spinules. A single species. No. 6, Ps. humeralis, Meigen 

 (Syn. Ps. buUata [Haliday, MS.], Walker). Wing dark rich brownish, 

 with glossy fringes to match, but the fringe at the base of the costa, of 

 the basal callosity, and of the anal lobe, matches the pubescence of the 

 meso- and metanotum in colour, shifting with change of posture from 

 light ferruginous or glossy bronze-brown to flaxen ; bristling hairs from 



certain standpoints black. Wing, 1-5 to 2-5 mm. long.... 



Psychoda, Section II. 



Geottp II. 

 8 — (la) Axillar nervure well-developed. Superior ^ appendages terminated by a 



compressed claw. Inferior ^ appendages minute, compressed obovate. . ,t^ 

 A single species, T. urhioa (Haliday, MS.), Walker (Syn. Psychoda 



aurea, Zett.) . Wing, 2-75 to 3-5 mm. long Trichomyia. 



a — Axillar nervure extremely short, almost transverse. Superior $ appendages 

 terminated by an acicular spinule. A single species, S. silacea (Haliday, 

 MS.), Walker. Wing, 1-5 to 1"75 mm. long Sycorax. 



