1906.] NATURAL SCIENCES OF PHILADELPHIA. 277 



PHASMID^. 



CEROYS Serville. 



1839. Ceroys Serville, Orthopteres, p. 262. 



Type. — C. perfoliatus (Gray). 

 Ceroys littiiis n. sp. 



Type: 9 ; Demerara, British Guiana. 1901. (R. J. Crew.) 



Not closely allied to any previously known species of the genus, dif- 

 fering in the absence of spines and in the lobation of the median and 

 caudal femora. This species may not be true Ceroys, but it does not 

 belong to any of the present allied genera. 



Size median; form moderately robust; surface smooth, not polished, 

 unarmed. Head rather long, subequal caudad of the eyes, occiput with 

 a faint median longitudinal impressed line and several very weak ones 

 laterad; eyes subglobose, moderately prominent; antennae filiform, 

 about equal to the head and thorax in length, the proximal joint de- 

 pressed. Pronotum nearly half again as long as broad, the lateral mar- 

 gins somewhat incurved, cephalic margin moderately concave, caudal 

 margin arcuate, transverse depression distinct, arcuate caudad, median 

 longitudinal depression very faint and incomplete. Mesonotum five and 

 a half times the length of the pronotum, a distinct dorsal line present 

 but no carina. Metanotum (including median segment) about five- 

 eighths the length of the mesonotum, the median segment very dis- 

 tinctly longer than broad and exceeding the length of the remainder of 

 the metanotum. Abdomen distinctly exceeding the remainder of the 

 body in length; four proximal joints simple, longitudinal and very 

 slightly increasing in length distad; fifth segment expanded meso- 

 caudad, in length about ec^ual to the fourth segment; sixth segment 

 simple, slightly shorter than the first proximal segment; seventh seg- 

 ment two-thirds the length of the sixth, somewhat expanded caudad; 

 eighth segment slightly shorter than the seventh ; ninth segment shorter 

 than the eighth, compressed, carinate dorsad, narrowly emarginate 

 caudad; supra-anal plate with the angulate tip alone visible; cerci 

 compressed, tapering, blunt, the length about two- thirds that of the 

 ninth dorsal segment; subgenital opercule boat-shaped, carinate in the 

 distal half, lanceolate, acute, not exceeding the tips of the cerci. Limbs 

 multicarinate, robust. Cephalic femora about as long as the mesono- 

 tum, compressed, basal flexure very marked and abrupt, the two 

 prominent dorsal and single ventral carina lamellato-carinate ; cephalic 

 tibise about equal to the femora in length and with three lamellate 

 carinse; tarsi with the proximal joint slightly longer than the remaining 

 joints. Median femora slightly shorter than the metanotum, the two 

 19 



