148 UNITED STATES NATIONAL MUSEUM BULLETIN 2 76 



Clara Co.); Uvas Canyon, Watsonville Roads; Waterman Gap (Santa Cruz 

 Co.). 



Intermediate Populations. — See M. califomicum calijornicum and Appendix 

 I (pages 142, 253). 



Malacosoma calijornicum recenseo (Dyar), new combination 



Malacosoma fragilis (Stretch), sensu the following authors: Essig, 1915, p. 411, 

 figs. 419, 420.— Van Dyke, 1928, p. 92 (in part).— Clark and Thompson, 

 1954, pp. 268-272 (in part).— Clark, 1955, pp. 373-376 (in part, Shaver 

 Lake — Dinkey Creek and Truckee populations). — Clark and Reiner, 1956, 

 pp. 653-659 (in part, Truckee population). 



Malacosoma pluvialis recenseo Dyar, 1928, p. 623, pi. 86c. — McDunnough, 1938, 

 p. 138. 



Malacosoma pluvialis form recenseo Dyar, Collier, 1936, p. 140. 



Malacosoma fragile (Stretch), sensu the following authors: Clark, 1956a, pp. 

 131-142 (in part, Truckee Basin population).— Clark, 1956b, pp. 728-732 

 (in part. Blue Canyon population). — Steinhaus, 1962, p. 433 (in part, 

 Nos. 617, 635, 1178). 



Malacosoma pluviale recenseo Dyar, Langston, 1957, pp. 8-9 (in part). 



This subspecies is recognized mainly by differences in the color of 

 adult males, and because of its relatively restricted distribution due to 

 physical and ecological barriers. 



ADULT MALES (figs. 188, 189).— Most males are very dark red- 

 dish-brown (fig. 188) with darker lines on forewings which may be 

 nearly absent on some specimens. Hindwings are usually same dark 

 reddish-brown as forewings, and usually without markings. Lighter 

 specimens are found in some collections, especially in populations 

 adjoining the northern end of the distributional range (fig. 3). These 

 specimens range from nearly normal dark ones to light yellowish speci- 

 mens found in some California populations of M. calijornicum and M. 

 calijornicum calijornicum. Varying numbers of the typical dark reddish- 

 brown males also are found in adjoining populations of M. calijornicum 

 found in northern California, southern Oregon, southwestern Idaho, 

 and parts of northern Nevada, but in these populations the lighter forms 

 predominate and the larval color pattern contains much more blue and 

 black than typical c. recenseo larvae. Lower surface of both forewings 

 and hindwings of dark specimens the same dark reddish-brown color 

 as upper surface, usually without markings; lower surface of lighter 

 specimens also lighter, but marked with a single contrasting line across 

 both forewings and hindwings that is most distinct on the lightest 

 specimens. Terminalia (figs. 21, 46, and 66) as described for the north- 

 western populations of A/, calijornicum vmder "comments" (page 128). 



