354 THE CANADIAN ENTOMOLOGIST. 



above description was prepared for use in another place from a 

 specimen named by Norton, this specimen was not available 

 when the present papeT was prepared. Ashmead made this 

 species the type of a new genus, Periolistoptera, which cannot be 



differentiated from Caliroa quercusalba, Nort. 



9. Front with the sides of the pentagonal area expanded above the bases 



of the antennae into mound-like prominences 10. 



Front with the sides of the pentagonal area somewhat expanded above 

 the bases of the antenna 1 , but never mound like 11. 



10. Frontal crest broadly interrupted at middle, the head polished ; body 

 black, with the front and middle legs below the knees and the basal 

 half of the posterior tibia? and tarsi, white ; the walls of the 

 pentagonal area fairly distinct, expanded below into strongly-dilated 

 mound-like areas, forming a broad frontal crest broadly interrupted 

 at middle ; area above the frontal crest broadly flattened, becoming 

 more or less concave between the lateral ocelli, and extending as a 

 blunt, tongue-like, flattened projection between the lateral ocelli ; the 

 V-shaped furrow wanting ; the median fovea represented by a 

 roughened, more or less irregular area between and below the 

 dilated ends of the frontal crest, the hypoclypeal area elevated at 

 middle into a ridge of the same height and width throughout, the 

 ridge twice as long as wide ; a large puncture on each side of the 

 front, situated opposite the enlarged ends of the frontal crest ; the 

 postocular area much broader than long ; the front between the 

 eyes and the pentagonal area slightly concave ; the vertical portion 

 of the antennal furrows fairly deep, line-like, not expanding at the 

 surface ; the interocular furrow completely wanting ; the antennae 

 with indistinct segmentation, the first and second segments together 

 five-eighths the length of the third, the third one and one-half times 

 as long as the fourth, the fourth slightly longer than the fifth, the 

 sixth three-fourths the length of the fifth, the seventh, eighth and 

 ninth subequal in length and slightly shorter than the sixth, the 

 ninth segment with straight sides and truncated at apex ; the thorax 

 polished and finely sericeous ; the wings hyaline ; the veins, includ- 

 ing the costa and the stigma, brownish ; the front wings with the 

 free part of R 4 subequal in length with the free part of R 5 ; the free 

 part of R 4 and the radial cross-vein straight ; the greatest length of 



