234 p. CAMERON. 



New Mexico. 



This species is closely allied to P. coloradoensis described above. I 

 at first thought that it might be its % ; but the interstitial second 

 recurrent nervure and its very different form precludes one from 

 regarding them as the sexes of one species. The second cubital 

 cellule is smaller, especially behind, than it is in coloradoensis ; in 

 the latter the second abscissa of the cubitus is more than half the 

 length of the third ; in the present species it is not half its length. 



PEMPHREDONID^. 

 Peniphretlon tiiictipeniiis sp. nov. 



Black, densely covered with long pale pubescence; wings hyaline to the trans- 

 verse basal nervure, distinctly tinged with fuscous beyond, iridescent, the nerv- 

 ures and stigma black; abdominal petiole slightly longer than the dilated apical 

 part, as long as the hind coxse and trochanters united, stout, curved, above 

 coarsely rugosely punctured, the apex with a furrow down the middle, the sides 

 broadly furrowed down the centre, the furrow clearly defined ; the pygidiuni 

 triangular, strongly, closely punctured laterally, the middle bordered by stout 

 keels, forming an area of equal width, with three round fovese in the centre. 

 Apex of clypeus broadly rounded. Ocelli '.*, close together, the hinder separa- 

 ted from each other by about half the distance they are from the eyes. Apex 

 of clypeus broadly rounded. Metanotal area large, covered with stout, curved, 

 mostly longitudinal strise, which become finer towards the apex. Mesonotum 

 closely, finely, transversely striated at the base, the rest much more strongly 

 transversely striated ; mixed with punctures in the middle at the apex. Clypeus 

 with fine, clearly separated punctures. Front closely, almost rugosely punc- 

 tured, with a smoother, semicircular depression over the antennse. Pronotum 

 and mesonotum closely rugosely punctured, the latter with a fine longitudinal 

 furrow down the sides; the scutellum is more coarsely punctured, more or less 

 striated in the middle; the postscutellum is more finely punctured ; the apical 

 slope of tlie metanotum is irregularly punctured-striated and with a wide, deep 

 furrow down the middle. Propleurse not very strongly or closely punctured, 

 striated in the middle. Mesopleurse closely, rugosely punctured, almost reticu- 

 lated in front; a distinct, curved, crenulated furrow on the lower basal half. 

 Metapleurse almost smooth at the base, the middle with shallow, distinctly sepa- 

 rated punctures, the apex reticulated. Ai>ex of middle tibiae with reddish spines 

 at the apex ; the hinder with a few shoit, stumpy black sjiines. Temples wide, 

 occiput transverse. 9- Length 11 mm. 



The second cubital cellule is large, almost square, receiving the recurrent 

 nervure at the apex of the basal fourth ; the first recurrent nervure is received 

 shortly beyond the middle of the cellule; the cubitus behind it being roundly 

 curved towards the costa. The abdomen behind the petiole is longish-ovate. 



Arizona. In my collection. 



This species I at first concluded might be P. concolor Say. P. 



morio Cress, is considered by Mr. Cres.-ion (Trans. Am. Ent. Soc., 



1887, p. 283, supp.) to be idiMilical with eo)U'olor ; u comparison of 



