1921] NATURAL SCIENCES OF PHILADELPHIA. 215 



ly rounded, surface heavily impresso-punctate, this disappearing 

 meso-distad, without hairs orwellsuppliedwith hairs, discoidalsectors 

 longitudinal; veins invisible except in certain lights, except in por- 

 tion of dextral tegmen concealed when at rest, which is subchitinous. 

 Wings ver)'' large in porportion to body bulk, costal veins not clubbed, 

 discoidal and median vein forming an elongate acute ellipse, crossed 

 by numerous transverse veinlets, an irregular network of veinlets 

 distad in area between the unbranched ulnar, anal and first branch 

 of the axillary vein; appendicular field with basal line rounded 

 obtuse-angulate, length nearly equal to width in males, length 

 distinctly less than width in females, this area folding and curling 

 into a tight roll when at rest; radiate field folding fanwise. Dorsal 

 surface of male abdomen with median segment specialized. Cerci 

 short, fiattened dorsad, lateral margins complete. Male subgenital 

 plate symmetrical, with similar, unspecialized styles. Female sub- 

 genital plate valvular. Limbs with femora unarmed except as 

 follows: cephalic femora with ventro-cephalic margin supplied dis- 

 tad with minute, piliform but well separated spines, or lacking these, 

 with a single elongate heavy distal spine; median and caudal femora 

 with a similar distal spine on both ventral margins. Tarsi pilose 

 ventrad, lacking pulvilli, caudal metatarsus as long as combined 

 length of succeeding joints. Tarsal claws delicate, symmetrical, 

 unspecialized; arolia absent. 



Oulopteryx dascilloides-^ new species. Plate XV, figures 5, 6. 



This species, though congeneric, differs in many respects from 

 0. meliponarum, with which it is compared on page 247. 



The blackish brown, usually coriaceous pronotum and tegmina 

 and general contour strongly resemble certain species of Coleoptera. 



Type: cf ; Pariacabo, French Guiana. [Paris Museum.] 



In addition to the characters given in the generic description, 

 we note the following. Size smaller, form not as elongate as in 

 meliponarum. Head somewhat shorter than in that species, very 

 slightly longer than broad. Interocular space three-quarters 

 width between antennal sockets. Maxillary palpi shorter than in 

 meliponarum. Pronotum smaller, discal boss stronger and giving 

 the pronotum a decidedly less flattened appearance. Tegmina 

 extending beyond cereal apices, decidedly coriaceous, sutural and 

 costal margins rather strongly oblique to rounded apex in distal 

 third. Wings with rolls of folded appendicular field lying obliquely. 

 Median segment rather strongly impressed meso-proximad, with 

 a short transverse ridge mesad on each side, the impressed area in- 

 vaded by a blunt angulation meso-caudad, with a heavy tuft of 

 agglutinated hairs springing from the depression in front of that 

 point, directed cephalad. Supra-anal plate with length approxi- 



2' In allusion to the superficial resemblance shown by this species to members 

 of the coleopterous genus Dascillufi. 



