1905.] NATURAL SCIENCES OF PHILADELPHIA. 419 



Form subfusiform; entire surface, except the abdomen and ventral 

 aspect, rugose. Head with the occiput and vertex gently rounded, 

 descending to the extremely narrow interocular space; fastigium 

 horizontal , produced from the interocular region at a level well below 

 that of the vertex into a peg-like process about as long as the width 

 of one of the eyes, compressed, faintly sulcate dorsad, expanding 

 proximad, apex when viewed laterad rotundato- truncate; face retreat- 

 ing, subconcave when viewed laterad, frontal costa present as a 

 slight short sulcation on the ventral aspect of the fastigial process; 

 lateral ocelli placed on the dorsal aspect of the proximal part of the 

 fastigium, median ocellus placed in the middle of the sulcation of the 

 frontal costa; eyes ovate, the greatest length diagonal, greatest 

 length slightly greater than the infraocular portion of the gense; 

 antennae broken in the type. Pronotum rounded, subselliform, no 

 median or lateral carinse present ; cephalic margin slightly rotundate 

 with a broad shallow median emargination; caudal margin rounded 

 rectangulate, no distinct angle present; transverse sulci strongly im- 



Fig. 2C. — Q^dalomelopon petasatum n. gen. and sp. Type. 



pressed, three in number, prozona slightly longer than the metazona; 

 lateral lobes slightly longer than deep, cephalic margin slightly arcuate, 

 ventral margin emarginate cephalad, broadly subrotundate caudad, 

 caudal margin with the dorsal half with a distinct but very shallow 

 emargination, the ventral half with a blunt angle which rounds into 

 the ventral margin; a longitudinal group of irregular callosities pre- 

 sented in the usual position of the lateral carina?. Tegmina broken, 

 siu-face coriaceous, rugose. Wings broken. Abdomen somewhat 

 compressed, carinate above; ovipositor jaws weak, slender, unarmed. 

 Prosternal spine a blunt cone, cpadrate in basal outline. Interspace 

 between the mesosternal lobes slightly wider than deep, as wide as the 

 lobes themselves, angles slightly rounded; interspace between the 

 metasternal lobes equal to the mesosternal interspace cephalad, con- 

 stricted caudad to slightly less than half that width. Cephalic femora 

 moderately robust, about two-thirds the length of the pronotum. 



