LIST OF DIPTERA. 



more than its length from the middle cross-vein ; poisers yellow. 

 Length of the body 4 lines ; of the wings 7 lines. 



Helomyza interjecta, n. s., fern. Fulva, capite fiavo vario, abdo- 

 mine nigro-fasciat.o,palpis antennis pedibusque fulvis, alis ful- 

 vis fusco bimaculatis et ad costam vittatis. 

 Body tawny, thinly clothed with black hairs and bristles : 

 head yellow in front, and indistinctly striped with yellow on the 

 crown ; epistoma not prominent ; face quite flat, without hairs or 

 bristles : eyes red ; fore part flat, composed of much larger facets 

 than those elsewhere : sucker tawny, clothed with pale tawny hairs : 

 palpi tawny, beset with black bristles : feelers tawny, much shorter 

 than the face ; third joint conical, rather deep, rounded at the tip, 

 about thrice the length of the second ; bristle black, slender, fea- 

 thered with hairs of moderate length at the base, about thrice the 

 length of the third joint : breast pale tawny : abdomen obconical, 

 narrower but not longer than the chest; hind borders of the second 

 and of the following segments black ; tip also black : legs tawny, 

 clothed with black hairs and with a few black bristles ; tips of the 

 claws black ; fore thighs armed beneath with a row of long stout 

 black bristles : wings tawny ; a brown stripe passes from one-fourth 

 of the length of the fore border to the tip, where it widens and be- 

 comes paler and blends with the gray of the hind border ; two 

 brown spots enclose the middle and lower cross-veins; wing-ribs 

 tawny; veins black, tawny towards the base; lower cross-vein 

 straight, with the exception of a very slight inward curve in the 

 middle of its course, more distant by half than its length from the 

 middle cross-vein ; poisers tawny. Length of the body 3 lines ; of 

 the wings 6 lines. 

 a. Venezuela. From Mr. Dyson's collection. 



Helomyza tincta, n. s., fern. Ferruginea, abdominis basi apicegue 

 fulvis, palpis fulvis, pedibus ferrugineis, alis cinereis costa ner- 

 vorumque marginibus fulvis. 



Body ferruginous, clothed with short black hairs : head and 

 chest beset with a few black bristles : head with a hoary tinge be- 

 hind ; sides of the face without bristles ; epistoma not prominent : 

 eyes pitchy ; facets small : sucker pitchy, clothed with lawny hairs ; 

 palpi tawny, beset with black bristles : feelers tawny at the base : 

 abdomen linear, pitchy, a little narrower and very much longer than 

 the chest, tawny at the base, tapering towards the tip, which is also 

 tawny : legs pale ferruginous, clothed with short black hairs ; tips 

 of the shanks beset with black bristles ; claws black, ferruginous at 



