138 Mr. T. D. A. Cockerell on 
(2) Santa Fé, Aug. 3, one on Solidago canadensis ; (3) So- 
corro, N. M., June 29, one on a species of Composites ; 
(4) Las Cruces, N. M., Sept. 3, one on Solidago canadensis ; 
(5) Las Cruces, June 16, on Aster sptnosus ; (6) Mesilla, 
N. M., Aug. 15, one on Solidago canadensis; (7) Mesilla, 
Aug. 29, on Bigelovia Wrightii; (8) Colorado Springs, Col., 
middle of July. The specimens from Santa Fé 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 Hrysimum, 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 antenne. Punctuation strong 
and moderately dense, but not nearly so coarse or dense as in 
carinata; 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 midge; 
mandibles very broad, with a conspicuous prominence on the 
outer side not far from the base; antenne entirely dark ; 
flagellum slightly inclined~ to be flattened. Metathorax 
obliquely truncate, the upper edge of the truncation shining. 
Tegule 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. 
Hab. At flowers of Opuntia with H. opuntie, Soledad 
Cafion, Organ Mountains, N. M., May 22 (CxiZ.). 
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. 
