TRICIIOMYIA. 261 



Genus III. ULOMYIA. 



Ulomyia, ITal. Snccopteryx, Hal. ; Curt. B. E. 715 : (name preoccupied 

 in Mammalia, lUiger.) Tlpida p., L. ; F. E. S. Psychoda p., Meig. 



Proboscis brevis, non compressa. Labrum breve. Maxillse obsoletas. 



Antenna? moniliformes. ALas. Alaj sinu medio convexo. 



Proboscis sliorter than in FsijcJioda., not compressed. Labrum short. 

 Maxilltse obsolete. Antennte moniliform. Wings tense. Male. Wings 

 with a coriaceous pouch. 



The larva lives in clear running water, and has, like a dorsi- 

 brauchial Annelid or Ph^llodoce, down the back two rows of acute, 

 lanceolate, foliaceous branchia-like appendages ; each row consists 

 of three pair on each segment, viz. a pair on each of the three 

 folds or subdivisions of the segment. Otherwise most like the 

 larva of Pericoma. 



1. hirta, L. F. S. ii. 1772 (1761) ; V .—fnUgbwsa, Meig. Nigro- 

 fusca, alis apice maculis tribus albicantibus. Long. 1\ ; alar. 3 lin. 



Blackish-brown. Wings with three apical whitish spots. 



Not rare. (E. S. I.) Fabricius expressly mentions the white 

 tip of the wing (in Pericoma mihila the cilia of the apex are 

 whitish at the end only, dusky at the base) ; Linna;us does not; 

 but the chequered black and white suits this species better than 

 P. nuh'ila. Ilcared from larvcC found on fallen leaves lying in a 

 waterfall of a clear rivulet. 



Genus IV. TRICHOMYIA. 



Trichomyia, Hal.; Curt. Brit. Ent. 7-45 (1839). Phalanomyia, Loevv. 

 Psychoda p., lloser ; Zett. 



Oculi rotundi, rcraoti. Antenna 12-articulatc'c, articulis obconicis. 



AUiB a])iee rotundatte ; areolae brachiales clausae ; vena postrema ab- 



breviata. 



Antcnnaj filiform ; first and second joints thick ; the rest longer, 

 somewhat conical. Wings with a complete discal arcolct ; five external 

 arcolets ; second pctiolatcd ; third complete ; brachial areolcts not ex- 

 ceeding the first third of the wing ; costal areolcts half divided ; veins 

 very hairy. Valves of the oviscapt broad, ovate. 



1. urbica, Hal.; Curt.B. E. 7-^l'5. 8 (1839).— «?<r(?a, Z^H.—flaves- 

 cem ? lloser. Ftjcm. fusca, nigro-hirta, fronte thorace et abdominis basi 

 flavo-hirtis, alis tlavescentibus nigro-bifasciatis, halteribus pallidis apice 

 nigro-fuscis, teuioribus tibiisque flavesccntibus. 



Fern. Brown. Front, thorax, and base of abdomen clothed with 



