1913.] NATURAL SCIENCES OF PHILADELPHIA. 351 



hrunneri Giglio-Tos than to any of the other forms of the genus. 

 From the former it can be immediately separated by the absence of 

 decided lobiform furci>la, while from the latter it can readily be 

 distinguished by the heavier, deeper head, the more vertical face, the 

 more elongate supra-anal plate, the more' tapering and strongly 

 incurved cerci, the less produced subgenital plate and very different 

 coloration. 



Size medium; form robust. Head not elevated dorsad of the k-vel 

 of the pronotum, the interocular region and the fastigium regularly 

 declivent; interocular width moderate, slightly greater than the 

 interantennal width of the frontal costa, hardly more than a 

 third the width of the eye; fastigium distinctly transverse, margins 

 distinct and rectangulate, surface of the fastigium and the inter- 

 ocular portion of the vertex very slightly excavate; face moderately 

 retreating, subvertical for a very short distance dorsad, forming a 

 slight obtuse angle at the junction with the fastigium; frontal costa 

 in general subequal in width, the average breadth slightly less than 

 that of the interocular portion of the vertex, strongly narrowing 

 dorsad to the junction with the fastigium, slightly narrowed imme- 

 diately ventrad of the ocellus, sulcate throughout ; antennae about 

 two and one-half times the length of the pronotum; eye not at all 

 prominent when seen from above, in outline reniform-ovate, 

 the infra-ocular portion of the genae about two-thirds the length of 

 the eye. Pronotum roughly semicylindrical, the dorsum regularly 

 rounding into the lateral lobes, no shoulders present but a very brief 



Fig. 18. — Paradichroplus nigrigena n. Fig. 19. — Paradichroplus nigrigena n. 

 sp. Dorsal outline of apex of abdo- sp. Lateral outline of apex of abdo- 



men of type. ( X 4.) men of type. ( X 4.) 



carina indicated cephalad on each side; cephalic margin arcuate 

 with the faintest possible median emargination, caudal margin very 

 broadly but decidedly emarginate; median carina faintly indicated, 

 but continuous; prozona twice as long as the metazona; lateral 

 lobes decidedly longitudinal, the depth contained nearly twice in the 

 length, ventral margin obtuse-angulate mesad; surface of the 

 metazona strongly punctate when compared with the prozona. 

 Tegmina linear, hardly equal to the length of the pronotum, very 



