104 CLARK — SOME UNDESCRIBED SPHINGIDAE § [Py civic" 
Sphinx dolli engelhardti subsp. nov. 
Plate XI, figure 3. 
Al. ant. long., o#', 25 mm.; 9, 26 mm. AI. ant. lat., 7,9 mm; Q, 
9.5mm. Marg., ext., o',14mm.; 9, 14.5 mm. 
Habitat. — Bellevue, Washington Co., Utah, 4000 ft. alt. Three males 
and one female, June 27, 1917, in coll. B. Preston Clark; one male in coll. 
Brooklyn Museum. 
Some years ago Mr. George P. Engelhardt took a male of 
Sphinx dolli in Bellevue, Utah. It is now in the Brooklyn 
Museum of Arts and Sciences. It was supposed at the time to 
be S. dolli dolli. In the summer of 1917 Mr. Jacob Doll and 
Mr. George P. Engelhardt went to Utah, the special object of 
the trip being to rediscover Sphinz dolli. They took four speci- 
mens, three males and one female, which on examination prove 
to be a hitherto undescribed form of dolli, to which I have 
given Mr. Engelhardt’s name. 
This Utah form is midway between coloradus and dolli. The head and 
thorax are light gray, in contrast to coloradus, in which the patagiae are 
dark brown, bordered with a black line, outside which is a narrow white 
line. The thoracic marking of dolli are similar to those of coloradus, but 
are dark gray where coloradus is brown. The abdomen of engelhardti is 
light gray, the fringe of tergites brown; abdominal side patches dark gray, 
but not prominent as are the side patches in both dolli and coloradus. The 
antennae are lighter in color than in the other two forms. 
The fore and hind wings above are uniformly gray, there not being the 
contrast in color between the whitish light-colored costal area of coloradus 
and the darker posterior area. The ground tone is darker than in dolli. 
The dark submarginal line R2—M2 occurs in this form, but is less marked 
than in coloradus. The dark markings, so prominent in the fore wing of 
-coloradus, are much fainter in the Utah form, though more prominent than 
in dolli, in which they ‘are vestigial. 
The fore and hind wings below are gray, like dolli, and unlike the brown 
tone of coloradus. 
