LIST OF DIPTERA. 1011 



square spot on the fore part near the neck, which is yellow : a small 

 black spot on each side of the scutcheon : abdomen linear, narrower 

 and much longer than the chest, thinly clothed with short black 

 hairs : legs yellow, clothed with short black hairs ; claws black : 

 wings colourless, long, narrow, adorned with a brown stripe, which 

 extends from the base and occupies the whole of the tip, and forms 

 three curves in its junction with the colourless part along the hind 

 border ; there are some tawny intervals at the base and along the 

 colourless part of the fore border, which extends near three-fourths 

 of the length of the wing ; it is nearly interrupted by two outward 

 curves of the brown part, and it has a small black spot by the black 

 spine of the wing ; wing-ribs tawny ; veins black, tawny towards 

 the base ; lower cross-vein very slightly curved outward, rather less 

 than its length distant from the middle cross-vein, which is straight, 

 perpendicular, and less than half the length of the lower cross-vein; 

 longitudinal veins very slightly waving ; poisers yellow. Length 

 of the body 2| lines ; of the wings 6 lines. 

 a. North America ? Presented by the Entomological Club. 



Trypeta cornifera, n. s., mas. Fulva, capite Jlavo, quadricornuto , 

 thorace niyro trimaculato, palpis antennis pedibusque jlavis, alls 

 limpidis angustis fulvo variis. 



Body tawny, slender, beset with a few black bristles: head yel- 

 low, armed above with four black horns ; these are as long as the 

 head and somewhat widened towards the tips, which are truncated : 

 face whitish, its sides without bristles ; epistoma not prominent : 

 eyes red ; fore part slightly convex, its facets larger than those else- 

 where: sucker tawny, clothed with yellow hairs; palpi yellow, beset 

 with a few black bristles : feelers yellow, shorter than the face ; 

 third joint conical, very much longer than the second ; bristle slen- 

 der, downy, black towards the tip, nearly thrice the length of the 

 third joint : disk of the chest slightly ferruginous ; a black square 

 spot on the fore part, near the neck, which is yellow ; a small black 

 spot on each side of the scutcheon : abdomen linear, narrower and 

 much longer than the chest, thinly clothed with short black hairs : 

 legs yellow, clothed with short black hairs ; claws black : wings co- 

 lourless, long, narrow, adorned (excepting the hind border) with 

 tawny marks from the base to the tip ; these have some slight 

 brownish intervals, include four oblong, colourless spots, and are ob- 

 liquely interrupted at three-fourths of the length ; beyond this they 

 form a semicircular stripe, whose concave side fronts the hind bor- 

 der, towards which it sends forth a very oblique branch ; wing-ribs 

 and veins tawny ; lower cross-vein hardly curved outward, rather 

 less than its length distant from the middle cross-vein, which is 



