OF WASHINGTON. 105 
obtuse elevation midway on each side, basal angles produced 
into spines; elytra scarcely narrowed posteriorly, posterior 
margin rounded with apices sub-acute. 
d\ Length 18.8 mm. Elytra distinctly narrowed poste- 
riorly, and uniformly dull orange colored in pinned specimens 
(bright orange-red when living). 
$ and c? type No. 8401, U. S. N. M. ; c? Blue Mts., Wash., 
July, 1896. Collector, C. V. Piper. The specimens before me, 
15 in number, show little variation from the type, except one 
male, in which the fifth joint of each antenna is deformed. 
Collected in numbers by Professor C. V. Piper, in the Blue 
Mountains of Oregon, and the Bitter Root Mountains of Idaho, 
feeding on the flowers of the black-berried elder, Sambucus 
melanocarpa. 
The following table will aid in the identification of the 
species of this genus: 
I. Elytra with basal third orange -colored, posterior two- 
thirds blue, without orange margins. Sexes equal in size and 
of the same color. Elytra of & not distinctly narrowed towards 
apex palliatus. 
II. Elytra with orange margins in one or both sexes; males 
smaller, with elytra distinctly narrowed towards apex. 
A. Elytra with narrow orange margins in both sexes. 
L a. Elytra pubescent cribripennis. 
b. Elytra glabrous, punctures dense and fine towards 
apex calif ornicus . 
B. Elytra with orange margins in female; entire elytra 
orange in male. 
a. Female elytra with narrow orange margins . . .piperi. 
b. Female elytra with broad orange margins, darker only 
on median dorsal surface auripennis. 
Mr. Pratt exhibited slides and figures of larvae, pupae and 
adults of Ceratopogon guttipennis Coq. which he had found in 
the mountains at Bluemont and Woodstock, Virginia. The 
larvae were found living in hollow tree stumps filled with water, 
in company with larvae of three species of mosquitoes; Culex 
triseriatus, C. signifer, and Anopheles barberi. Their food 
seemed to be the rotting leaves, dead insects and other debris. 
He stated that the little "gnats," or. as they are locally called 
"punkies" or "no-see-ums," were exceedingly troublesome, 
especially early in the morning. Mr. Burke asked if any 
species of Ceratopogon occurred on the Pacific coast and M 
