194 Mr. T. D. A. Cockerell — Descriptions and 



quadrangle broader than long ; pubescence white, scanty, 

 tinged with yellow on apex of abdomen and inner side of 

 tarsi ; liead, thorax, and abdomen brilliantly shining, but 

 the front, except at sides, dull and densely granular-punctate, 

 the bases of tlie second and third abdominal segments also 

 with broad dull microscopically sculptured bands ; apical 

 part of mandibles dark reddish ; process of labrum very 

 large, shining and concave above, broadly truncate at apex, 

 but the truncation gently rounded ; clypeus with rather 

 sparse irregular strong punctures, and a deep median linear 

 groove on the upper two-thirds ; sides of face shining, with 

 the punctures running more or less in lines ; flagellum dark 

 castaneous beneath except at base ; sides of vertex shining, 

 irregularly rugoso-punctate ; mesothorax shining and 

 sparsely punctured, with deep median and parapodial 

 grooves ; area of metathorax small, finely striate; tubercles 

 shining, thickly fringed with pale greyish hair ; tegulse 

 rufo-testaceous, darker basally. Wings dilute brownish, 

 the large stigma and nervurcs f usco-ferruginous ; b. n. 

 falling a trifle short of t.-m. ; marginal cell brpadly truncate ; 

 first r. n. joining second s.m. about one-fourth of the distance 

 from base. Legs black, hind tarsi dark brown. Abdomen 

 elongate, the hind margins of the segments very broadly 

 depressed, the shining depression of second segment about 

 as broad as the part before, the latter consisting of an opaque 

 anterior half, and a shining posterior one, the two parts 

 abruptly separated, but the extreme base narrowly shiny ; 

 fifth ventral segment deeply grooved in middle, the groove 

 ending at the apex of a large triangular light ferruginous 

 area. 



Hah. Cloudcroft, New Mexico, Sept. 5 {Cockerell). 



A commonplace looking species, but with good characters. 

 Compared with P. j)orter(E it is smaller but very similar, yet 

 easily distinguished by the second abdominal segment^ which 

 has the abruptly defined opaque basal part so closely 

 sculptured that the punctures cannot be separately made 

 out with a lens ; whei'eas in porter(S the basal ]3art has 

 distinct punctures, is not opaque, and is not abruptly defined. 

 Compared with P. ornatipes, P. nubis has a much narrower 

 thorax and much broader process of labrum. It is not the 

 female of P. barberi, from the same region_, as the meso- 

 thorax is much more sparsely sculptured, and the paler 

 stigma is narrower and more pointed at end. On the whole, 

 P. nubis is closest to P. didin/pa, which differs from it by 

 the broader smooth band between the opaque band and 

 apical depression on second abdominal segment, the lack of 



