ICHNEUMON-FLIES, PART 2 : EPHIALTINAE 171 



front and middle tibiae whitish with faint narrow subbasal and broad 

 apical fulvous bands; front and middle tarsi white, the apices of their 

 first four segments pale fulvous and the last segment mostly brown; 

 middle coxa and trochanters fulvous behind, the front white; hind 

 coxa fulvous; hind trochanters fulvous, whitish below; hind femur 

 fulvous, without an apical fuscous area; hind tibia white with 

 exceptionally wide subbasal and apical black bands; first four segments 

 of hind tarsus white, their apices very broadly black, the apical 0.65 ± 

 of the second black; fifth segment of hind tarsus black, narrowly pale 

 at base. 



Female: Colored like the female of Iseropus stercorator orgyiae 

 except that the hind femur never has a distinct fuscous mark, the 

 subbasal and apical black bands on hind tibia are connected ventrally 

 by a dark brown or fuscous stripe, the black bands on the hind tibia 

 and tarsus average somewhat wider, and that the front and middle 

 tibiae have indistinct external basal and premedial whitish marks. 

 These marks on the front and middle tibiae are faintly indicated also 

 in some specimens of /. stercorator orgyiae. 



Specimens (32 d\ 669): From Arizona (Oak Creek Canyon, and 

 Parker Creek and Workman Creek in the Sierra Ancha); California 

 (Big Pine Creek in Inyo Co. at 7,500 ft., Brentwood, Camino, Dar- 

 danelle, Fish Camp, Gold Lake in Sierra Co., Huntington Lake in 

 Fresno Co., Los Angeles, Marion Aft. Camp in the San Jacinto Mts., 

 Mount Diablo, San Francisco, Stanford, and Yosemite): Colorado 

 (Piatt Canyon); and Washington (Bellevue). 



Collection dates are from April 19 (in the Sierra Ancha, Ariz.) 

 to July 19 (at Fish Camp, Calif.), plus one record for August 15 at 

 Bellevue, Wash., and another for September 8 at San Francisco, 

 Calif. We have found it common from mid-spring to early summer 

 (before the dry part of the summer), usually among the shrubby 

 growth in the semiarid areas between desert and forest. We have 

 not however, collected within its range late in the season. It may 

 be common then also. 



Host records are: 1 rearing from Malacosoma calif ornicum , 2 from 

 M. fragile, 1 from M. pluviale, and 1 from Malacosoma sp. 



This species is common among dense, shrubby growth in semiarid 

 parts of western United States, in the Transition zone. It is adult 

 from mid-spring into the summer. Malacosoma spp. serve as hosts. 



3. Iseropus coelebs (Walsh) 



Figures 321,1; 363 



Ichneumon inquisitor Say, 1829, Contr. Maclurian Lyceum Arts Sci., Philadelphia, 

 vol. 1, p. 71 (Leconte ed. vol. 1, p. 375); 9- Name preoccupied. Type: 

 9 , Indiana (destroyed) . 



