138 Mr. T. D. A. Cockerell on 



(2) Santa ^e, Aug. 3, one on Solidago canadensis ; (3) So- 

 corro, N. M., June. 29, one on a species of Corapositse ; 



(4) Las Cruces, N. M., Sept. 3, one on Solidago canadensis; 



(5) Las Cruces, June 16;, on Aster spinosus ; (6) Mesilla, 

 N. M., Aug. 15, one on Solidago canadensis ; (7) Mesilla, 

 Aug. 29, on Bigehvia Wrightii] (8) Colorado Springes, Col., 

 middle of Julj. The specimens from Santa Fe and Colorado 

 Springs seem to average larger than those from the Mesilla 

 Valley. Of the male I have three examples from Ruidoso 

 Creek, collected by Prof. E. O. Wooton, one on Veronica, 

 sp., July 1 ; one on Erysimum, at 6600 feet, July 3 ; one on 

 Rhus, at 6600 feet, July 10. It will be noted that the 

 females were all taken on Composite, but not so the males. 

 The species apparently does not fly earlier than about the 

 middle of June. 



Heriades gracilior, sp. n. 



? . Length 8 millim. or slightly over. 



Black ; abdomen long and rather slender, with parallel 

 sides. Pubescence dirty white, scanty and inconspicuous on 

 head and thorax, most abundant about tubercles, hind border 

 of scutellum, and round the antenna. Punctuation strong 

 and moderately dense, but not nearly so coarse or dense as in 

 carinaia ; the shining surface of the mesothorax is plainly 

 evident between the punctures, and still more is that of the 

 abdomen. Head longitudinally broad-oval ; clypeus strongly 

 punctured, bulging, with more or less of a central ridge; 

 mandibles very broad, with a conspicuous prominence on the 

 outer side not far from the base ; antennae entirely dark ; 

 flagellum slightly inclined to be flattened. Metathorax 

 obliquely truncate, the upper edge of the truncation shining. 

 Tegulse shining piceous. Wings smoky hyaline, darkest in 

 and just beyond the marginal cell. Venation as in carinata, 

 except that the marginal cell is relatively longer and narrower. 

 Legs sparsely hairy. Abdomen with very distinct but very 

 narrow white hair-bands. Ventral scopa white, not very 

 abundant. 



Bab. At flowers of Opuntia with H. opnintice, Soledad 

 Caiion, Organ Mountains, N. M., May 22 {Cidl). 



A considerably larger insect than H. carinata \ it is of the 

 same group, though it exhibits a style of punctuation more 

 common in the next group. 



