128 



PROCEEDINGS OP THE ACADEMY OF 



[Feb., 



Figs. 6, 7. — Diapheromera (Cera- 

 tites) covillece n. sp. Lateral 

 outline of head of male (6) 

 and female (7). (X 3.) 



metanotum in both sexes, the cephalic margin of the segment arcuate. 

 Abdomen equal to (cT) or slightly longer (?) than the remainder 

 of the body, the segments slenderer and more elongate in the male 

 than in the female; segments increasing in length to the third which 

 is subequal in length with the fourth and fifth, the sixth is slightly 



shorter; male with the seventh dorsal 

 abdominal segment two-thirds the 

 length of the sixth, moderately inflated 

 distad, eighth and ninth dorsal seg- 

 ments and cerci of the male absent or 

 mutilated, eighth ventral segment of 

 the male very short, strongly trans- 

 verse, subgenital opercule elongate, 

 narrow, the apical portion sharply 

 curved dorsad and then with the marginal portion sharply bent at a 

 right angle, slightly expanded laterad, the median portion of the 

 apical margin truncato-arcuate ; female with the seventh dorsal 

 abdominal segment about two-thirds the length of the sixth, the eighth 

 about two-thirds the length of the seventh, the ninth slightly longer 

 than the seventh, strongly tectate, the apical margin obtuse-angulate 

 emarginate, supra-anal plate tectate, rounded at the apex, cerci short, 

 conic, not a fourth the length of the ninth dorsal abdominal segment, 

 subgenital opercule very slightly|exceeding the apical margin of the 



eighth dorsal abdominal segment, 

 lanceolate, acute-angulate. Ceph- 

 alic and caudal limbs of the male 

 very slender, the cephalic femora 

 slightly longer than the pronotum 

 and mesonotum together, basal flex- 

 ure rather shallow, cephalic tibiae 

 distinctly longer than the femora; 

 caudal femora reaching to the base of the fifth segment, armed with 

 a well-developed spine and with the ventral carina slightly serrato- 

 dentate, caudal tibia? distinctly longer than the femora, slightly 

 bowed, the distal extremity very slightly inflated. Median femora 

 strongly inflated, about equal to the mesonotum in length, supplied 

 with numerous carina?, the ventral ones moderately serrato-dentate, 

 the subapical spine very stout, acute, with a sigmoid twist, median 

 tibia? longer than the femora, more robust than the same portions of the 

 cephalic and caudal limbs, markedly serrato-dentate ventro-cephalad. 



Fig. 8. — Diapheromera (Ceratites) 

 covillece n. sp. Lateral outline of 

 apex of female abdomen. (X 3.) 



