i&z HYMENOPrERA ACULEATA. 



narrowed posteriorly, face eubelou- 

 gate. 



(16) 15. Face in cJ hairy; mandibles black ; ¥, 



flagellum o£ antenna? pale beneath . hialinata. 



(15) 16. Face in (J glabrous, mandibles with a 

 white streak ; ilagellum in ? black be- 

 neath. 



(18) 17. Labrum in $ black ; third ventral seg- 

 ment with a distinct central callosity ; 

 5 , cheeks shorter, lateral facial spots 

 smaller and narrower, basal segment of 

 abdomen polished ..... confusa. 



(17) 18. Labrum in ^ white; third ventral seg- 



ment simple ; $ , cheeks longer, facial 

 spots larger and more widely-triangu- 

 lar, basal segment of abdomen micro- 

 scopically rugose ..... GENALIS. 



(14) 19. Antennje shorter ; scape of the $ much 

 swollen, face not hairy, mandibles 

 black ; ? , pronotum entirely black, ver- 

 tex of head quadrately produced pos- 

 teriorly ; face nearly round . . . bbeticoknis. 



(13) 20. Scape of the antennas in the $ not 

 swollen, parallel-sided ; ? , face short 

 and round, spots suboval, and placed 

 diagonally pictipes. 



P. COrnuta, Smitli. — Black, bead and thorax dull, closely 

 punctuied, clotbed iu the S with short greyish-brown 

 hairs, face in the c? convex, the antenna pale j'ellow, the 

 scape dilated, convex in front, black posteriorly and fringed 

 with long pale hairs, the joints of the flagellum posteriorly 

 with a black line, face behind the scapes of the antennae 

 with a shining excavation into which they fit ; ? with the 

 clypeus strongly reflexed at its lateral angles and produced 

 into two angular teeth, which look like spines when viewed 

 from above, antennae simple, piceous beneath j tegulae each 

 with a yellow spot, wings slightly smoky, nervures testa- 

 ceous, and the ? sometimes with two yellow spots on the 

 collar, propodeum rugose at the base; abdomen shining, 

 first and second segments rather strongly punctured, 

 remainder more finely so, second, especially in the (J, with 

 a well-defined transverse impression, seventh ventral seg- 

 jutnt in this sex produced at the apex into two curved 



