264 FAMILY VII. — CORISCIDjE. 



with fuscous. Head porrect, more or less fuscous, finely pubescent. Anten- 

 nae with joints 1 — 3 dull yellow, subequal in length, 1 feebly thickened to- 

 ward apex, 4 with basal third yellow, remainder fuscous. Pronotum as 

 in generic key, the humeral angles subacute. Hind femora clavate, the 

 apical half armed beneath with three or four stout spines and two or 

 three minute teeth. Length, 11 — 13 mm. 



Brownsville, Tex. (U. S. Nat. Mus.). Recorded by Barber 

 from Miami, Fla., and Arizona. Ranges from those states 

 south to northern South America. The specimens at hand lack 

 the "corii macula longe pone medium pallidis" mentioned by 

 Stal in his original description and on which he based his spe- 

 cific name ; nor can I find any trace of the teeth at base of hind 

 femora used by Fracker (1918, 261) as the principal character 

 in his generic key separating Burtinus from Megalatomus. Al- 

 though using it thus, in his description of B. notatipennis farther 

 along he says : ''posterior femora . . . usually with an obsolete 

 little tooth near base." The Alydus femoralis (Distant, 1881, 

 158) is, as pointed out by Barber (1914, 521), a synonym. 



IV. CORISCUS Schrank, 1796, 121.= (Alydus) . 



Elongate-slender bodied pilose species having the head decli- 

 vent in front, nearly as long as pronotum and as broad across 

 the eyes as base of latter ; antennae slender, half the length of 

 body, first joint but little swollen, shorter than second; eyes 

 very prominent, subpedunculate ; beak reaching middle coxa?, 

 joint 2 subequal to 3 and 4 united, 3 shortest ; pronotum sub- 

 quadrate, slightly longer than wide, its side margins slightly 

 sinuate, entire; corium with apex very long, oblique, sinuate, 

 its apical angle extending beyond middle of membrane, the lat- 

 ter reaching or slightly exceeding tip of abdomen ; osteolar 

 opening distinct, slit-like, situated between the middle and hind 

 coxae; femora relatively slender, front and middle ones un- 

 armed, hind ones armed beneath with a row of stout spines and 

 a few spinules; tibiae slender, terete, unarmed; basal joint of 

 tarsi twice the length of the other two united. 



Six species are at present recognized from North America, 

 three of which occur in the eastern states. 



KEY TO EASTERN SPECIES OF CORISCUS. 



a. Pronotum with humeral angles obtusely rounded, the side margins 

 not distinctly paler than the disk. 

 b. Head and pronotum with numerous erect hairs; pronotum usually 

 blackish-bronzed, rather coarsely and densely punctate; mem- 



