1909.] 



NATURAL SCIENCES OF PHILADELPHIA. 



127 





nal segments of the male type are absent or mutilated, the injury being 

 due to the work of a fellow prisoner in the cyanide bottle. 



Size moderately large; form moderately slender in the male, more 

 robust in proportion in the female ; surface smooth, polished in the male. 

 Head slightly longer than the pronotum, broad, very slightly depressed 

 in the male; occiput moderately inflated, somewhat globose; inter- 

 ocular region with a pair of short, erect, 

 well separated conical horns, the horns 

 placed nearer the eyes than they are to 

 one another; eyes globose, quite promi- 

 nent in the male when seen from the 

 dorsum, somewhat smaller proportion- 

 ately and less prominent in the female; 

 antennae reaching nearly to the apex 

 of the abdomen in the male, reaching 

 about to the third abdominal segment 

 in the female. Pronotum longer than 

 broad, the caudal portion slightly con- 

 stricted; cephalic margin very slightly 

 arcuato-emarginate, caudal margin sub- 

 truncate in the male, very broadly 

 obtuse-angulate in the female; trans- 

 verse depression broad and deep, mak- 

 ing the pronotum subsellate when seen 

 from the side, longitudinal median 

 sulcus very slight. Mesonotum slightly 

 more (d 1 ) or slightly less (9) than 

 twice the length of the head and pro- 

 notum together, rather narrow, sub- 

 equal distad and expanding in the 

 caudal third in the male, regularly 

 but not greatly expanding caudad 

 throughout its whole length in the 

 female. Metanotum and the median 

 segment but slightly shorter than the 

 mesonotum in the male, three-fourths 

 the length of the same in the female, 

 no broader than the mesonotum and 



similar in shape in the male, about equal to the widest portion of the 

 mesonotum in the female; median segment slightly (c?) or strongly 

 < 9 ) transverse, less than a fourth the length of the remainder of the 



Fig. 5. — Diapheromera(Ceratites) 

 covilleoe n. sp. Dorsal view of 

 male type. (Natural size.) 



