316 ENTOMOLOGICAL SOCIETY 



eyes brown ; palpi pale yellowish, hairs white. Thorax, with the hair 

 mixed with a few blackish scales; primaries white, more or less densely 

 sprinkled with blackish scales at the posterior third, and sparsely so 

 on the remaining portion. These dark scales produce a powdery ap 

 pearance of the wings, the amount varying in the specimens before me, 

 there being in two of them but a faint trace of the darker scales; second 

 aries white, with a broad dusky anterior margin; undersurfaces more 

 densely flecked with blackish scales and hence somewhat darker. Abdo 

 men fuscous above, with a few long whitish hairs on the terminal two 

 joints; venter and legs white. Tip of the abdomen shaped as in P. 

 marginatus. 



I have five specimens of this species, all females, two of them 

 reared from the seed-pods of Yucca whipplei in May, 1886, by 

 Mr. Koebele, the pods obtained at Santiago, California, while 

 three specimens were given me by President H. W. Harkness 

 and Mary K. Curran, of the California Academy of Science, in 

 April, 1887, and obtained from the flowers of the same Yucca. 

 The adolescent states are still unknown. 



Prodoxus y-inversus, n. sp. IMAGO 9- Fig. 19. Average expanse, 14 

 mm.; ^,10-12 mm. General color white. Head, thorax, legs, and ab 

 domen white beneath, the hairs between the antennae occasionally yel 

 lowish. Eyes black; palpi white; tip of labials yellowish ; tongue pale 

 yellowish. Primaries marked with black as follows a costal streak 



Fig. 19. Prodoxus y-inversus : a, left front wing hair-line underneath 

 showing natural size; b, genitalia of male, dorsal view X J 4; c -> do., 

 lateral view X J 8; </, anal joint of female, with ovipositor exserted, lat 

 eral view X 2 ? e i tip of ovipositor still further enlarged. 



along the basal half, widening somewhat posteriorly and more or less 

 completely fused, with a round spot near its end. An elliptical or 

 roundish spot about the middle of the wing at the basal third ; a more or 

 less sharply defined inverted-Y-shaped band across the posterior third of 

 the wing, with its exterior arm generally connected posteriorly with a 

 black patch which extends along the posterior border but is more or less 

 broken at the extreme border, and also along its inner margin. This 



