286 U. S. NATIONAL MUSEUM BULLETIN 2 1 6 paet 3 



Female: Front wing 8.0 to 12.5 mm. long; temple at its midheight 

 about 0.83 as long as eye, moderately convex; second flagellar seg- 

 ment about 3.3 as long as wide, but the length a little variable ac- 

 cording to the subspecies; widest subapical segments of flagellum 

 about 0.67 as long as wide; punctures on mesopleurum of moderate 

 size, sharp, crowded, their interspaces very narrow; basal transverse 

 carina of propodeum varying from complete and moderately strong 

 to absent except for a short vestige behind the spiracle; apical carina 

 of propodeum moderately strong, widely interrupted in the middle; 

 hind femur about 5.4 as long as deep; hairs on second tergite dense 

 except on the median apical part, where then- sockets are separated 

 by a little more than the length of the hairs ; ovipositor sheath about 

 0.90 as long as front wing; ovipositor about 6.2 as long from nodus 

 to apex as it is deep at nodus. 



Ferruginous. Median part of occiput and sutural marks on thorax 

 black; basal part of flagellum fulvous or more or less infuscate; apical 

 part of flageUum blackish; flagellum usually with a broad median 

 incomplete whitish band; wings orange yellow marked with dark 

 brown, the pattern on the front wing as in figures 359 and 360; hind 

 femur usually brownish apically; hind tibia infuscate apically; basal 

 0.2 ± of second tergite black, the black mark not reaching lateral 

 edge of tergite and often narrowed or interrupted medially. 



There are two subspecies, distinguished mostly by the extent of 

 infuscation on the wings and flagellum. They intergrade gradually 

 and freely in southern California and adjacent Mexico. Specimens 

 from this area of intergradation have been classified and recorded 

 as one subspecies or the other, rather arbitrarily according to their 

 greater conformity with the majority of characters of one or the 

 other, as keyed and described below. 



MALES 



1. Yellow markings on wings more extensive, the apical yellow area on front 

 wing usually reaching subdiscoidal vein (fig. 359); segments 2-5 of flagel- 

 lum fulvous or brownish fulvous, not at all infuscate above; range: western 

 Texas and Oklahoma to southern California, southward into Mexico. 



3a. calipterus calipterus (Say) 



Yellow markings on wings less extensive, the apical yellow area on front 



wing usually not reaching subdiscoidal vein (fig. 360) ; segments 2-5 of 



flagellum usually fuscous or somewhat infuscate above; range: California, 



except part of southern California . . 3b. calipterus brevicornis Cameron 



FEMALES 



L Yellow markings on wings more extensive, the apical yellow area on front 

 wing reacliing subdiscoidal vein (fig. 359) ; flagellum with a median dorsal 



