260 CHARLES A. BLAKE. 



low, iiervm-es yellowish ; a round fuscous cloud beneath the cells ; legs blackish, 

 thinly clothed with long, pale, yellowish pubescence ; abdomen elongate ovate, 

 basal segment campanulate, finely punctured, second segment shining, minutely 

 and remotely punctured, sparsely clothed with yellowish white hairs, apical 

 margins of all the segments fringed with long, coarse, yellowish white pubes- 

 cence; apex armed with two long, acute, recurved spines. Length 11-14 mm.; 

 expanse of wings 21-25.5 mm. 



Hab. — Nevada. Collection of Mr. Norton. 



Photop^^iN Orizaba Blake. 



Male. — Black ; head round, as wide as the thorax, finely punctured, thinly 

 clothed with erect yellowish hairs; eyes very large, round, convex; ocelli promi- 

 nent ; antennae piceous, as long as the head and thorax; thorax: pro- and meso- 

 thorax coarsely jiunctured, the latter with two longitudinal impressed lines on 

 the disc and two short ones near the tegulfe ; metathorax rounded, coarsely re- 

 ticulate, with three short, sharp, longitudinal carinje not extending to the middle ; 

 tegulfe round, convex, polished ; wings ample, yellowish hyaline, marginal cell 

 elongate ovate, first submarginal long and narrow, second subquadrate, pointed 

 towards the base, receiving the fir.st recurrent nervure before the middle and 

 having a faint fuscous cloud divided by a longitudinal transparent line ; a large 

 fuscous cloud in the discoidal region ; apex slightly clouded ; legs black, femora 

 clothed with long scattered hairs, tibise and tarsi with yellowish pubescence; 

 abdomen elongate ovate, petiolate, petiole segment one-third the length of entire 

 abdomen, shining, feebly punctured, thinly clothed with erect hairs, second seg- 

 ment polished, having a few very minute i)unctures, interspersed with scattered 

 hairs ; lateral carina; distinct, clothed above and beneath with dense white pu- 

 bescence ; apical margins of the segments clothed with long yellowish pubescence ; 

 under side polished, having a few scattered hairs. Length 13 mm. ; expanse of 

 wings 21 mm. 



Hab. — Mexico. 



PIiotoi>»>»i»$ iiokoini»« Blake. 



Male. — Head black, shining, punctures very minute and bearing a few scattered, 

 erect, yellowish hairs ; eyes large, round, convex ; ocelli prominent ; antennse 

 and mandibles dull rufo-fuscous, tips of the latter black ; thorax honey yellow, 

 shining, closely punctured, disc of mesothorax with two longitudinal impressed 

 lines; metathorax rounded, coarsely reticulate, the disc having three short lon- 

 gitudinal carinae not reaching the middle ; wings ample, hyaline, marginal cell 

 elongate ovate, i)ointed at tip, first submarginal long and narrow, second elongate 

 subquadrate, its basal and apical nervures sinuate, receiving the recurrent ner- 

 vure before the middle ; stigma prominent, fuscous, its apical half within the 

 marginal cell ; legs fusco- piceous, thinly clothed with pale hairs; abdomen elon- 

 gate ovate, petiolate, petiole pyriform, rufo-testaceous, paler at base, closely punc- 

 tured and sparsely clothed with erect hairs; second segment black, polished, 

 finely and remotely punctured, interspersed with long, scattered, i)ale hairs; re- 

 maining segments black ; apical margins ciliated with glittering yellow pubes- 

 cence ; under side dark fuscous, apex armed with two minute, acute, recurved 

 spines. Length 11 mm. ; expanse of wings 17 mm. 



Hab. — Arizona. 



In some specimens the head is honey yellow. 



