Genera and Species of Hymenoptera. 209 



;iiul sliining; immediately in front of the ocelli is a shallow 

 semieirciilar depression, with a short, stout, longitudinal keel 

 in its centre at the a|)ex. The centre of the face broadly 

 projects, rugose, almost transversely striated at the sides; the 

 dypeus smooth, sparsely covered with short wiiite hair. 

 Mandibles large, entirely black ; the base with a iaw punc- 

 tures; the j)al|)i white. Thorax entirely black, except the 

 tubeicles, which are white. Mesonotum shining, thickly 

 covered with short fuscous hair, closely but not strongly 

 punctured, the lateral lobes more weakly than the middle ; 

 the parapsidal furrows reach near to the apex and are ob- 

 scurely crenulated ; the scutellum very shinifig, sparsely 

 punctured and haired; the basal keels yell )w ; the post- 

 scutellum very smooth and shining, the depression at its 

 sides coarsely rugosely keeled ; the apex of the segment is 

 bordered by a stout transverse keel. The base of the median 

 segment behind the transverse keel smooth, almost glabrous, 

 in front of the keel strongly transversely striated in the 

 middle, the sides punctured; the apex is obliquely sloped ; at 

 its base is a stouter keel than that found on the middle, and 

 it is, if anything, more stoutly and regularly transversely 

 striated. The top of the propleurte is coarsely punctured; 

 below strongly longitudinally striated. Mesopleui^ai rugose, 

 longitudinally striated in the middle, strongly so at the baso 

 above, and still more strongly in the middle ; at the bottom 

 is a wide and deep crenulated furrow. Metapleurge coarsely 

 punctured, covered thickly with long, soft, white hair. All 

 the coxffi are black; the four anterior trochanters white, the 

 hinder black ; the fore legs pale, the middle dark testaceous ; 

 the hinder femora rufous ; the tibiae testaceous, narrowly 

 black at the base, more broadly at the apex ; the hinder tarsi 

 white ; the basal two thirds of the basal and the whole of the 

 apical joint black. Wings clear hyaline, the stigma fuscous 

 on the lower side ; the areolet slightly longer than broad and 

 of nearly equal width throughout; the recurrent nervure is 

 received in tlie apical fuurtli. Abdomen shining, the seg- 

 ments narrowly bordered on the apex with testaceous, the 

 second more broadly than the others ; the apical segment 

 broadly, the penultimate more narrowly, bordered with white; 

 the petiole is very smooth and shining. 



Dayro, gen. nov. 



Areolet large, almost square, the transverse cubital uervures 

 parallel ; the recurrent nervure is received in the middle, 

 where it is slightly angled, the transverse basal nervure is 



