136 PROCEEDINGS OF THE ACADEMY OF [1897. 



head and thorax. In general appearance it resembles the Mexican 

 Mutilla cyllene Cam. 



Sphaerophthalma donae-anas n. sp. 



9 • — Length from 8 to 10 mm. ; brownish-ferruginous, with black 

 aud silvery pubescence, mostly appressed. Head very large, sub- 

 quadrate, about as large, seen from in front, as the thorax seen 

 from the side ; cancellate from a very close punctuation ; pubescence 

 partly erect and partly depressed, not dense enough to hide the sur- 

 face, silvery on cheeks, in front of eyes, on scape and base of mandi- 

 bles, black on vertex ; a small, smooth, shining spot behind each 

 eye ; cheeks distinctly keeled, but not toothed ; mandibles with a 

 rather large tooth on inner edge, this tooth and all beyond it black ; 

 antennae reddish-brown with blackened tips, first joint of flagellum 

 nearly twice as long as second. 



Thorax strongly rugose-punctate, constricted at sides, abruptly 

 truncate behind, with a tubercle at the top of the truncation ; nearly 

 as broad behind as in front. Pubescence not dense enough to hide 

 the surface, forming a blackish triangular patch on dorsulum, its 

 apex directed caudad, its base convex ; outside of this large patch 

 the whole dorsal area is covered with glittering yellowish-silvery 

 hairs. Elsewhere on the thorax there is little pubescence, except 

 about and just above the legs, where it is appressed, dense and sil- 

 very. Legs dark ferruginous, with thin pale pubescence, anterior 

 tibia? blackish, spines on hind tibia? tipped with black. 



Abdomen pyriform, first segment broadening rapidly, its suture 

 with the second flat, its hind margin blackish ; second segment, partly 

 from the ground color and partly from the hairs, appearing bright 

 orange-rufous, glittering with metallic orange, without any discal 

 spots or marks, but with a very broad low black triangle on its hind 

 border. Remaining segments with glittering yellowish-silvery pubes- 

 cence, laterally with a few erect black hairs ; extreme apex black or 

 blackish, but this not due to pubescence. Punctuation of abdomen 

 close. 



The general effect of the head and thorax is a sort of purplish- 

 brown, contrasting with an orange-scarlet second abdominal segment. 



Hab. — The Mesilla Valley in Dona Ana County, New Mexico. 

 Mesilla, Aug. 15 and 18, 1896 (Ckll.) ; near Las Cruces, Sept. (Ckll., 

 4,857, 4,894). 



Close to S. contumax Cresson, from Colorado, but the thorax is 

 broader, less narrowed posteriorly, being nearly quadrate ; there is 



