THE UANAJJIAN ENTOMOLOGIST. 221 



tween clypeus and eyes, narrowing obliquely upwards so as to form 

 nearly a right-angled triangle, continuing narrowly a little way along the 

 orbital margin, then enlarging near the top of the eyes to a mark which 

 points inwards towards the ocelli. Cheeks yellow, the yellow continuing 

 across vertex as a narrow line. Mandibles yellow except ends. White 

 pubescence rather sparse on face and cheeks ; also on thorax, becoming 

 dense on lower part of pleura. Tubercles, sides of thorax except a 

 black patch on lower part of pleura, tegulpe except a pair of fuscous 

 spots (one much larger than the other), sides of mesothorax broadly, 

 extending along the front some distance to an oblique truncation, two 

 longitudinal stripes on mesothorax, and scutellum except median base, 

 all bright yellow. Mesothorax and scutellum granular from a very close 

 punctuation. Tubercles with a prominent keel. Hind margin of 

 scutellum rounded, with a wide median emargination. Tegulaj punc- 

 tured. Wings subhyaline, strongly smoky in upper part of marginal cell, 

 nervures black, second recurrent, going beyond tip of second submarginal 

 cell. Posterior truncation of thorax shining black, with a pair of broad 

 hammer-shaped yellow marks. Legs yellow ; some black on anterior 

 coxse above, and at base of anterior femora, also at base of middle tibiae 

 and on basal two-thirds of hind tibiae ; inner sides of all the legs largely 

 ferruginous. Middle and hind tibiae, and basal joint of hind tarsi, all 

 greatly broadened. Abdomen shining, microscopically tessellate, with 

 large sparse punctures. Entire apical yellow bands on segments 1-5, 

 broadest at the sides ; apex yellow. Ventral scopa dense, white. 



$ . — About the same size, abdomen more slender. Antennae 

 longer, scape yellow in front. Yellow spot near tip of eyes much 

 reduced, line on vertex broken and nearly obsolete. Stripes on dorsulum 

 wanting. Tegulse with one large dark spot. Posterior truncation all 

 black ; upper part of pleura largely black. No spine on posterior coxa. 

 First three bands of abdomen emarginate at sides. Rounded median 

 hind border of sixth segment projecting. Apex rounded, broadly 

 emarginate. 



Hal/. — Mesilla Valley, N.M., close to Agricultural College ; a 5 at 

 flowers of Larrea (Creosote bush), May 6 [Ckll.]; also a 9 taken May 

 18 by Mr. F. Garcia, and a ^ taken some years ago by Prof. Tcwnsend, 

 both in the Mesilla Valley. Unfortunately the ^ is reddened by cyanide. 

 Mr. Fox kindly compared this species with Cresson's collection, and 

 returned it marked " near occide?itaIe and zebratumy It can be dis- 



