IS1I5.J 211 



bracliial nervure (which is gently arcuate forwards thereabouts), and by the postical 

 nervure behind ; the former branch follows the crest of the protuberance, while the 

 latter passes with a low curve above its base. In front of all this, between the 

 radius and pra;brachial, is the narrow aperture of a collapsed pouch, formed by an 

 oblique inverted arch in the cubitus (shown by dotted lines in he. cit., pi. i, fiij. U, 

 S), that projects as a rounded lobe on the under-side, guarding the gaping orifice 

 of the inflated pouch. Seen from opposite the costa, the two pouches together 

 resemble an oval vesicle bisected obliquely in the plane of the wing. In a denuded 

 wing, mounted between glass and viewed with transmitted light, the curve in the 

 praebrachial is apt to simulate an arch ascending parallel with that of the anterior 

 pobrachial. 



Bristling hair extended in parts of the wing beyond the shortest line from the 

 end of the subcosta to that of the anal nervure ; present on the mediastinal, radial 

 stem and branches, cubitus, pobrachial stem and branches, postical and axillar 

 nervures ; wanting on the subcosta, pra?brachial and anal. This hair extends out- 

 wards farthest on the anterior radius, and farther on the posterior pobrachial and 

 postical than on the anterior pobrachial ; it is whitish up to the forks at the base of 

 the wing, and also for a short space at the outer terminations of the ranks, but 

 elsewhere dark. 



Beneatli the wings, in both sexes, at the extreme base of the nervures interior 

 to the fringes, linear scales take the place of hairs. Beyond this in tlie <? , the 

 nervures, from the cubitus to the anal, are densely squamose in the neighbourhood 

 of the pouches, and the hairs in the nearest ranks on the nervures next in front and 

 behind those are long ; the hair of the posterior radial, dense and silky, spreads over 

 the front of the collapsed pouch (the rim of which is bordered very densely with 

 short scales), while that of the axillar spreads forwards, like very slender flattened 

 ciliiE, below the anal. 



In the antenna; of <J the 3rd joint {i. e., 1st of the flagellum) is longer than 

 tlie 4th, and has elongate scales mingled with the hairs ; the nodules of the 15th 

 and 16th joints are not quite in mutual contact, but the nude beak of the 15th is 

 shorter than that of the 14th, or than the apiculus of the 16th joint ; articular 

 appendages apparently absent. In the $ the 3rd and 4th joints are subcqual in 

 length, and the nodules of the 15th and IGth in mutual contact. 



Palpi filiform, pubescent ; joints 2 and 3 in (? , or 2, 3, and 1 in ? , nearly equal 

 in lengtli to each other, and rather longer than 1, which in $ is subequal to 4. 



Proportions of the parts in the hind leg without much sexual ditference, but 

 rather to the advantai;;e of the ? in the tibia and tarsus. Tibial fringes moderate, 

 yet well developed. 



The larva, discovered by llaliday, is mentioned in Walker, Ins. Brit. Dipt., vol. 

 iii, pp. 254 and 2fil. Refer also to Osten Saeken, Trans. Knt. Soc. Loud, for 1895, 

 jip. 150 and 152, who quotes Haliday's statements. 



Ulomyia fuligikosa, Mcigcn. 

 Trichoptera fuliglnosn, Meig.,* Klassif. d. zweifl. Ins., Th. i, 45 

 (ISOi) ; id., Syst. Beschr. [ed. i], Bd. i, 107 (181S).— Psyc^orfa full- 



* Citations given at second hand in this article are distinguished by an a.steri.sk. 



