no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 219 



spots on the under side of the wings, and has fewer submarginal dark spots on the fore wings, 

 and in the extradiscal line being curved in behind the discal spot, and in the discal spots of the 

 hind wings being deeply incurved and bent. It varies in the width of the median field of the 

 wing, which is in one nearly twice as wide behind the discal spot as in the other c? . 



It resembles S. cecropia in size, in the shape of the discal spots, and in part, that of the 

 subapical ocellus, as well as the form of the discal line. On the other hand it resembles S. Colum- 

 bia in the size and shape of the discal spots, in the outer (marginal) line, in the broad white 

 basal and extradiscal bands, in the black apical mark and in the shape of the wings. 



In the venation S. gloverii and Columbia are very similar. As the origin of the veins II 2 , 

 II 4 , II 5 and first and second median in the fore wings are nearly identical, as a common line 

 intersecting them will form a nearly straight line, curved neither outward or inward. On the 

 other hand, the line thus formed in both cecropia and californica is much curved outward, most 

 so in S. californica. Also in the hind wings the outer fork of the s. c. and median veins are in 

 gloveri and Columbia nearly identical, but in cecropia that of the s. c. is situated farther out than 

 the other (median) while in californica the forks are directly opposite each other; on the whole, 

 however, the venation in cecropia and californica is quite similar. Thus S. californica in its 

 venation is so different from S. gloveri that it can hardly be said, as regards the venation alone, 

 to have directly descended from or been an offshoot from it. It should also be observed that 

 californica retains the short vein II 2 of the fore wings, not present in the three other species. 



[Geographical distribution. — Ranges over the region of the Rocky Mountains, from Arizona 

 in the south to Alberta and Assiniboia in the north. A small dwarfed form has been taken 

 upon the high mountains of Colorado, to which Neumoegen gave the subspecific name reducta. — 

 W. J. Holland. The Moth Book, p. 84.] 



The most southern locality in New Mexico from which I have seen this species is Frisco, 

 Socorro County, N. Mex. It is, however, reported by Snow as collected by Howard, and this 

 probably indicates its occurrence in Grant County, N. Mex. In Colorado S. gloveri ascends to 

 about 7,800 feet (near Ula; cf. Trans. Am. Ent. Soc, 1893, p. 356.) It breeds at this altitude; 

 I found a cocoon from which the moth emerged June 18. In Colorado it has also been found 

 at Rosita (Nash), Salida (Foster), Pueblo (Nash), and Canon City (Nash). — T. D. A. Cockerell 

 in litt. to Dr. Packard November 3, 1900. (Cf. also Twelfth Report, Colorado Biological Asso- 

 ciation.) 



[Also at Boulder, Colo., June 2, 1908 (A. Williamson) and May 31, 1912 (Homer Garwood).] 



[The following account of the transformations of Samia gloveri has been kindly supplied 

 by Miss Caroline G. Soule. She published it, with slightly different wording, in her works 

 "Caterpillars and their Moths" (1902). 



Egg period 1 1 days ; eggs like those of S. cecropia in size, shape, and color. 



Hatchlings. — Head shining black, round, with setae; body black, with shining black tubercles 

 tipped with horn-colored setae, noticeably long and slender. Legs and prolegs shining black. 

 They preferred young leaves of sapling choke-cherry, refusing even the tip leaves of older trees. 



First molt in seven days. — Head, legs, prolegs, shining black; body dull black with shining 

 black, spiny tubercles; the dorsal tubercles ringed with yellow at base. The horn-colored setae 

 gave place to long, stout, polished black spines. The first segment had a pale yellow spot. A 

 few of the larvae were of an orange color with black dots and tubercles. At this stage they 

 would eat wild cherry (Prunus serotina), but much preferred P. virginiana, a marked difference 

 from larvae of cecropia and promeihea. 



Second molt after five days. — Head small, smooth, round, greenish yellow with black marks. 

 Body greenish yellow, in some cases with black dots on the dorsal line. The tubercles on second, 

 third, fourth, and eleventh segments were orange and black, in some cases almost black, in others 

 orange with black spines. The other tubercles were shining black, as were legs and prolegs. 

 The venter was smoky black. 



Third molt two days later. — Head green with black marks. Body blue green on dorsum, 

 very yellow, green below subdorsal lines and marked with black on the venter. A black line 

 marked the rear of first segment. The tubercles on first segment were all black, or pale blue 



