OF WASHINGTON. 



315 



ened and converge to a rather sharp tip which is, however, obliquely trun 

 cate from the side; ovipositor issuing generally at right angles and with 

 the same parts as in yuccasella but all stouter and shorter (e,f). In the 

 (^ the dorsal fulvous suture or pit beween thorax and abdomen is more 

 profound and concave, the abdomen is less flattened and the claspers are 

 brown, very stout, one-half as long as the abdomen, the basal part broad 

 and leaf-like, the terminal part abruptly curved upward, dilated into a 

 decurved triangular tip, and the prong quite long, slightly curved and 

 denticulate at tip. (#, b.} 



Described from 28 9' s > IO cf' s fr m yucca brevifolia. 



This is the third species of Pronuba so far known, P. yucca 

 sella pollenizing and breeding in the fruit of the different Yuccas 

 growing within the United. States east of the Rocky Mountains 

 and showing a remarkable uniformity in coloration ; Pronuba 



Fig. 18, Pronuba maculata: a, tip of female abdomen ; bjo, basaljoint of 

 ovipositor; tjo, terminal joint do.; ov, oviduct; imp, max. palpus; mt, 

 maxillary tentacle ; /, tongue ; gs, claspers of male from sides ; gp, do. 

 from behind ; pr, front wings showing arrangement of spots in two of 

 the more common forms hair line showing nat. size. 



maculata (Fig. 18) affecting in a similar way Tucca whipplei of 

 California, and showing very great variation in the macula- 

 tion of the wings. This last is, also, one of the most remarkable 

 of the Lepidoptera, as it is the only species in which the tongue 

 has become so altered as to be scarcely capable of forming a tube, 

 the two parts being very easily separated and covered throughout 

 their length with dense hair. 



Prodoxus pulverulentus, n. sp. IMAGO 9- Expanse, 9-10 mm. Gen 

 eral color, white; head with the antennae white, the basil half fuscous; 



