138 AMERICAN HYMENOPTERA. 



markings are very uniform, however, and there is not enough range 

 of variation to cause doubt. The species is allied to sectilis in gen- 

 eral type of mticulation, but the head and thorax are not brown, 

 and the raaculation is black instead of brown. From advena it is 

 distinct by the obvious t. p. and s. t. line, the reverse being the case 

 in Mr. Grote's species. We have, evidently, a little series of closely 

 allied and very local forms in this genus. 



Oxyciieinifs* gusti!« n. sp. 



Bright bluisb-ash-gray ; head and thorax darker, almost blackish, with white 

 intermingled hair and scales. Thoracic tuft distinct, with metallic lustre. Pri- 

 maries with the cell whitish filled, basal space strongly white powdered, a dif- 

 fuse whitish shading beyond the incurve of the t. p. line and a well-defined 

 oblique smoky shading from costa within apex to the base of reniform. Basal 

 line obvious, upright, blackish, a little diflfuse. T. a. line a little oblique, with a 

 slight outward tooth at middle, blackish, diffuse. T. p. line narrower, not 

 sharply defined, blackish, squarely exserted over cell, with a decided incurve in 

 the submedian interspace. S. t. line vaguely indicated by a whitish shading 

 and a somewhat darker powdering in the terminal space. A distinct, black con- 

 tinuous terminal line at the base of the concolorous fringes which are narrowly 

 cut with smoky brown. Claviform obscurely outlined by blackish scales, large, 

 broad, scarcely relieved from tlie surrounding space. Orbicular round, of moder- 

 ate size, obscurely outlined by gray scales. Reniform broadly lunate, gray, not 

 well defined, outwardly obscured by the oblique subapical shading. Secondaries 

 white, costal region and a narrow outer border smoky and powdered ; fringes 

 white. Beneath : primaries smoky, costa whitish powdered, a distinct brown 

 terminal line, the fringes narrowly cut with white. Secondaries white, with a 

 smoky powdering in the costal region and a narrow outer line. 



Expands .85 inches = 21 mm. 



Hab. — Southern Arizona, August 1st to 15th, Poling ; one good 

 male. 



This is allied to hahoquavaria in type of markings, but is smaller, 

 paler gray, with diffuse markings and darker head and thorax. 

 Judging from the allied species the female will be larger and darker 

 and may be more definitely marked. I do not remember having 

 seen this form in other collections. 



Oxycnemis yuma n. sp. 



Ground color gray over a luteous base. Head a little less powdery than the 

 thoracic disc, but as a whole both are powdered with black scales, which are more 

 massed j)osteriorly on the tuft, which is less prominent than in the type form and 

 not metallic. Abdomen yellowish or whitish like the secondaries. Primaries 

 with all the transverse maculation obscure, strigate with white and black. A 

 dusky shading extends from apex to the inner margin within the anal angle and 

 this in part relieves the very irregular and fragmentary, diffuse pale s. t. line. 

 The claviform extends from base to beyond the middle of the wing, is narrow, 



