1920.] NATURAL SCIENCES OF PHILADELPHIA, 341 



sutures obsolete; very weak but distinct depressions run from the 

 eyes toward the middle of the caudal margin of the occiput; cheeks 

 almost as long as eyes, caudal margin of occiput very broadly and 

 weakly concave. Antennae with first joint three times as long as 

 distal width, enlarged in distal three-fifths; second joint very small; 

 third joint three-fifths as long as first; fourth slightly shorter; suc- 

 ceedmg joints increasing regularly in length and slenderness distad. 

 Pronotum small, three-quarters as broad as head, longer than wide, 

 lateral margins almost straight and showing an almost imperceptible 

 divergence caudad, caudal margin rather strongly convex; surface 

 of prozona weakly convex and showing a faint medio-longitudinal 

 linear sulcus, other portions deplanate except narrowly toward the 

 lateral margins where they are obliquely raised. Tegmina very 

 wide at shoulders where their combined width is slightly less than 

 twice the pronotal width, their length over twice that of pronotum, 

 narrowing evenly caudad, with caudal margins weakly oblique. 

 Wings fully developed, exposed portion nearly one-third as long as 

 tegmen. Abdomen widening moderately to distal portion, glands 

 of second and third tergites moderately prominent. Ultimate ter- 

 gite very slightly produced between forceps, caudal margin laterad 

 weakly concave and very weakly oblique, mesad straight, trans- 

 verse. Between the base of each arm of the forceps and the trans- 

 verse portion of the caudal margin, this tergite is inflated, weakly 

 convex, being depressed about these areas externally and in the 

 entire median area between them. Pygidium almost perpendicular, 

 as long as wide, lateral margins straight and parallel, latero-distal 

 margins weakly concave, oblique to the minute medio-distal portion 

 which is produced in a minute bi-denticulate projection, the angles 

 formed by the lateral and latero-distal margins also each produced 

 in a slightly larger denticulation. Forceps feebly divergent in prox- 

 imal fourth, thence almost straight to near the incurved apices, 

 moderately heavy proximad, tapering gently to apices; dorsal sur- 

 face deplanate to near distal portion, with delicate rounded ridge 

 bordering the external margin; internal surface flattened, unarmed 

 except for a small ventro-proximal uncinate tooth, with apex di- 

 rected caudad, and just before the middle with a heavy and moder- 

 ately large triangular ventral tooth, directed meso-ventrad. Caudal 

 margin of penultimate sternite transverse. Caudal metatarsus with 

 ventral surface well supplied with fine hairs, combined length of 

 two succeeding joints about three-quarters that of metatarsus. 



