1920.] NATURAL SCIENCES OF PHILADELPHIA. 247 



rowly rounding into the slightly retreating facial line; interspace 

 between the eyes broad, ])ut little narrower than the fastigium; fas- 

 tigium distinctly broader than long, truncate cephalad, very shal- 

 lowly and broadly excavate; frontal costa dorsad nearly as wide as 

 the vertex interspace between the eyes, regularly narrowing ventrad 

 until on the lower face, at the ventral third of the face, it is less than 

 one-half the width at the fastigio-facial region, subobsolete in the 

 vicinity of the clypeal suture, closely and deeply cribroso-punctate 

 dorsad and ventrad, excavato-sulcate mesad, lateral margins well 

 indicated; lateral facial carinae arcuate, converging to the clypeal 

 base: eyes quite prominent, subovate in outline, faintly flattened 

 ventrad, in depth about one and one-half times that of the infra- 

 ocular portion of the genae: antennae about two and one-third times- 

 as long as the pronotal disk, thick, apex moderately acuminate. 



Pronotum of moderate length, the greatest caudal width of the disk 

 contained one and one-third times in the greatest dorsal length of 

 the same; in section the prozona of disk is arcuate, the metazona low 

 tectate; cephalic margin of disk broadly and shallowly angalato- 

 emarginate mesacl, caudal margin of disk regularly obtuse-angulate 

 with ■ the immediate angle narrowly truncate; prozona slightly 

 shorter than the metazona; median carina obsolete, being but faintly 

 indicated by strumosities between the punctures, lateral angles not 

 at all indicated on the prozona, well marked but not carinate on the 

 metazona; transverse sulci deeply impressed, the median one slightly 

 weaker on the dorsiun than the other two: lateral lobes with their 

 greatest depth subequal to the greatest dorsal length of the same; 

 ventro-cephalic angle of lobes obtusely rounded, ventral margin 

 obliquely truncate cephalad, thence truncate to the broadly rounded 

 ventro-caudal angle, caudal margin obliquely subconcave. Tegmina 

 reaching to but not surpassing the apex of the abdomen; costal 

 margin regularly broad arcuate, sutural margin nearly straight, apex 

 rather narrow, obliquely subtruncate; principal longitudinal veins 

 decided. Wings reaching to the apices of the tegmina. Prosternal 

 spine distinctly compressed, directed moderately caudad, blunt; 

 interspace between the mesosternal lobes faintly longitudinal, the 

 internal face of the lobes arcuate; interspace between the metasternal 

 lobes slightly transverse. 



Furcula developed as broad, depressed, well separated, acute 

 trigonal lobes, the external margin of which is straight, the internal 

 concave: supra-anal plate escutcheon-shaped, slightly constricted 

 proximad, of the same form found in D. crassus, a median rectangu- 



