l.SG Mr. H. C. L. Perkins' 



58. (59) Clypeus luucli proeliiced, elongate ; no yellow .spot behind 



the antenna) ; inter-antennal carina extremely .sharp. 



Oielodiineriis rlielifer, P. 



59. (58) Clypeus wide, not much produced ; a yellow spot between 



the antenna- ; the inter-antennal carina less sharj). 



Pseudopterodieilus pterocheiloides, P. 



60. (27) Females. AuteniiEe 12-jointed, the apical joints simple. 

 Gl. (62) Maxillary palpi extremely long, regularly fringed with 



long hairs. . . PsendopterorheUns pterocheiloides, P. 



62. (61) Maxillary palpi normal. 



63. (64) Mandibles extremely long and narrow, teeth obsolete or 



subobsolete, a distinct longish cheek between mandible 

 and eye.'. . . . Ghelodynerus {g&w. wow) cheMfer,V. 



64. (63) Mandibles normal ; cheeks obsolete. 



65. (84) Second dorsal segment of abdomen in profile distinctly 



raised from the base or very strongly convex, often 

 tuberculate or subtuberculate in dorsal aspect ; if hardly 

 tuberculate, but very strongly convex in profile, then 

 either the mesothorax is shining betvA'een the punctures, 

 or the depression of the second ventral segment is very 

 wide and deep, and the segment prominent, and almost 

 tuberculate on either side of the depression at its base. 



66. (67) Mesothorax with extremely dense (shallow and not coarse) 



rugulose punctnration .0. veiuitor, P. 



67. (66) Mesothorax not so punctured. 



68. (69) Second ventral segment with a very shallow large impression 



behind the cost;e ; propodeum smooth. 



0. (Iromcdayiits, Blackb. 



69. (68) Second ventral segment Avith a large deep depression, or 



it is small, triangular, not extending half-way from the 

 costse to the apex (0. eyphotes), or the propodeum is 

 rugose. 



70. (71) A median red spot behind the antenna) (postscutellum 



and mesopleura sometimes also red-spotted, mesothorax 

 deeply punctured, not dull, minute interstitial punctures 

 very distinct, propodeum rugose). 0. mesospihis, sp. nov. 



71. (70) A yellow or yellowish spot behind the antennce, or none. 



72. (75) Mandibles red. 



73. (74) Head normal ; mesothorax with the larger punctures very 



fine and feeble, sparse; sometimes impunctate or nearly. 



0. erythrognatlms, P. 



74. (73) Head incrassate ; mesothorax distinctly, but not coarsely, 



punctured 0. orhn:}, P. 



75. (72) Mandibles dark, at most reddish at the apex. 



