88 PROCEEDINGS OF THE CALIFORNIA 
quite apparent, while in two others it is entirely absent. This species may, 
‘however, be always known by the thoracic and abdominal clothing, which is 
invariably dull olivaceous, with a brownish tinge, and is extended without 
any break to the yellow pre-anal segments. H. Thetis is found in the valleys 
of California, chiefly in the neighborhood of the Coast Range, and may be 
sought for, in May and June, in Napa, Sonoma, and Marin Counties. Itis 
especially attached to the flowers of various species of Lupinus. 
Coll. H. E., (exactly agreeing with Boisduval’s type) Dr. Behr, et al. 
Hemaris rubens, n. sp. (?) Hy. Edw. 
Under this name, if a true species, I wish to recognize two specimens, in 
my collection, in which the apical red mark is very distinct above and below, 
the oblique scale patch at the base of the primaries reddish, and the costa 
and margins of the wings on the lower side also with a decided reddish hue. 
In H. Thetis, the two pre-anal segments alone are yellowish, but in the two 
specimens referred to above, the yellow is carried on to the third segment, 
dorsally and beneath, but is interrupted on the sides by a black band. This 
appears to me to be a strong character, as in my examples of Thetis the yel- 
low shade is distinctly confined to the two pre-anal segments. Slightly 
smaller than Thetis. The tuft of yellow hairs on the hind tibiz is present in 
this species. 
Oregon, Lord Walsingham. Lake Tahoe, Cal., Mrs. Hy. Edwards. Coll. 
H. E. 
Hemaris cynoglossum, n. sp. Hy. Edw. 
Size of H. Thetis. Head above, pale yellowish olive; eyes, margined behind 
with white scales. Palpi, pale yellowish, with the terminal joint tipped with 
black. Thorax above, bright greenish olive, without the brown tint observable 
in Thetis. Basal segments of abdomen, rich velvety black. Two pre-anal 
segments, pale yellowish, with a darker median shade. The under side of 
abdomen, including the anal tuft, is wholly black, except the edges of the 
pre-anal segments, which are pale lemon yellow. The thorax is less covered 
beneath with yellowish hairs than in Thetis, and the pale scales are hardly 
visible at the base of the wings, while the tufts of yellow hairs on the tibia, 
so eminently characteristic of Thetis, are here wholly wanting. The wings 
above and below are similar to the allied species, but are decidedly more 
opalescent, giving out a most beautiful bluish reflection. Antenne, blue 
black. The fore wings are a little sharper at the apex than those of Thetis. 
Two 6’, two , Coll. Hy. Edw., taken by myself on flowers of Cynoglossum 
grande, Dougl.; Napa County; Big Trees, Calaveras County, Cal.; Vancouver 
Island. 
The species of the genus Hemaris are very closely allied, and can be 
separated only by characters which in other genera would hardly be deemed 
sufficient to indicate a difference of species. I think, however, that the 
absence of colored hairs on the basal segments of the abdomen, and of the 
pencils of yellow hairs on the hind tibiz, will serve as good grounds for 
