760 ZOOLOGY— INSECTS. 



l;ir double rows of orange blotches, with white spaces about the spiracles. 

 The spiracles themselves are black. Each segment, is provided with five 

 rather long spines, from each of which project about sixteen or eighteen 

 long black hairs. The base of each spine is surrounded by a dirty-white 

 ring, and some minute white irrorations are scattered over the whole upper 

 surface between the spines. Head rather small, black, very glossy. Feet 

 ash-color, banded with black. Length, 1.05 inch. Food-plant, Castttleja 

 brcviflora. 



" The caterpillars feed chiefly on the flowers, and are solitary in their 

 habits, only one being usually found on each plant. 



"Chrysalis. — Fawn-color, very faintly marked with pale-brown dots and 

 dashes over the entire surface. On the thorax are two raised, shining points, 

 and each of the segments, except the two last, possess a treble row of small, 

 shining tubercles." 



tMELIT^A HOFFMANNII, Behr. 



Melita-a Hoffmannii, Beur, Proc. Cal. Acad. Sci., 18G3. 



This species was also brought in by the expedition of 1871, but is not 

 known from Colorado. Of it Mr. Henry Edwards writes : — 



"31. Hoffmannii, Behr. — A very distinct and rather rare species, found 

 only in the warm valleys of the Sierra Nevada, where it loves to fly among 

 the flowers of Composite, and particularly the various species of Artemisia. 

 I have taken it from May to July, but only at distant intervals, and never 

 at a less altitude than from 2,500 to 3,000 feet above the sea level." 



M ELITES A CALYDON, Edw. 

 Melitcea Galydon, Edw., MS. 



11. Calydon was only found at Turkey Creek Junction, Colorado, June 

 20 to 30. About twenty-five specimens were taken. This species is allied 

 to Palla of California, to which the males are very similar ; the resemblance 

 between the females, however, is less noticeable. 



MELIT^A ARACIINE, Edw. 

 Melitvea Arachne, Edw., Trans. Am. Ent. Soc, 18G9. 



This species was quite rare, but occurred here and there in the mount- 

 ain district below 9,000 feet, and one specimen was also taken on the plains 



