74 t April, 



AnteiiDEc in the ^ blackish, with dark grey hair on the flagellum ; scales on the 

 scape dull jellowish-brown. Palpi blackish, " shot " with glossy greyish. Pubescence 

 of frons, vertex and body, dull yellowish-brown, " shot " at the tips of the hairs on 

 the thorax with grey or blackish. 



Probably a common species, like P. exquisita, in England. In 

 Scotland, Mr. King captured it at Locb Lomond (May, 1889 -. \ ^ , 

 1 ? ) and Loch Maree (June and July, 1890 : 3 <^, 3 ? ). 



13. Pekicoma blandula, Etu. 

 P. blandula, ante, 2nd ser., vol. iv, 123, and vol. v, pi. ii, P. 13 

 (details). 



Within the region of bristling hair, the dark fascia across the bases of the forks 

 is formed as ill P./aZZaa; ; it is joined along the prsebrachial nervure to the dark 

 apical region, as in P. trifasciata, witliout any break ; tlie further broad interrupted 

 band of whitish bristling hairs is iraraerliately succeeded by the dark apical region, 

 without any outward-pointing whitish hairs intervening. Pubescence of the thorax 

 and abdomen brownish-grey. In fig. P. 13, a, d, the beak of the superior ij genital 

 appendage is defective, owing to an accidental overlapping thereabouts of the tracings 

 photolilhogi'a plied. The length of the beak should be seven-ninths the length of 

 the bulb. 



Worn and faded specimens of P. blandula are very liable to be 

 assigned to P. gracilis, if the white space in the posterior fringe of 

 the wing is nearly effaced ; they may also be confused with P.fallax. 

 On the other hand, prime specimens of P. blandula have a very close 

 resemblance to newly emerged examples of P. trifasciata, with the 

 whitish space in the fringe interior to the end of the axillar nervure 

 obsolescent or undeveloped. AVhere individual males are in question, 

 the dift'crences in the length of beak in the terminal joint of the 

 superior genital appendages, or in the form of the joint as a whole, 

 are of great assistance in discrimination between these species. 

 Eemalcs past their prime are best left alone. 



14. Pekicoma trifasciata, Meigen. 

 Trichoptera trifasciata, Meig.,* Klassif. d. zweifl., Bd. i, 44, tab. 

 ii, 20 (1804). — Psychoda trifasciata, Lat., Gen. Crust, et Ins., iv, 251 

 (1809) ; Meig.,* System Beschr. [ed. i], i, 105, tab. iii, 18 (1818) ; id., 

 op. cit. [ed. ii], i, 83, tab. iii, 18 (1851) ; Zet., Dipt. Scand., ix, 3703 

 (1850). — Pericoma trifasciata, var. ^, dcalbata (Hal., MS.), Walk., 

 Ins. Brit. Dipt., iii, 259 (1856) ; {trifasciata) Etn., ante, 2nd ser., 

 vol. iv, 123 ; and vol. v, pi. ii, P. 14 (details). 



Within the region of bristling hair, the dark fascia across the bases of the 

 forks is united to the dark apical region along the prtebrachial nervure- without a 

 break ; the further inlorrupted fascia of bristling whitish hair (which in P. blandula 



