50 Riley Notes on Yucca Insects and Yucca Pollination. 



and it is curious to note that while the form of the genitalia, 

 though showing slight variation, corresponds with that of Pro- 

 doxus decipiens, yet the claspers agree more nearly with those of 

 Pronuba yuccasella, in having but the one large tubercle. 



Prodoxus intricatus sp. nov. I recently received from Mr. J. T. 

 Mason, who has been kind enough to observe and collect some 

 of the Yucca insects for me, a number of specimens of a Pro- 

 doxus which he found in the flowers of one of the tree Yuccas 

 in Jalapa, Mexico. He sent also flowers and sections of one of 

 the leaves of the Yucca, which, from this material, appears to 

 be, without much doubt, Yucca guatemalensis. The moths were 

 found abundantly in the flowers, but unfortunately reached me 

 in rather dilapidated condition. The species is of the same gen- 

 eral size as Prodoxus reticulatus, and with a somewhat similar 

 but more varied and less distinct maculation. It is, however, a 

 much darker species. I would simply characterize the species 

 here, by comparison with reticulatus, with a view of adding one 

 more link in our knowledge of the Prodoxids associated with 

 the different species of Yucca. 



In size and general appearance most nearly related to P. reticulatus, the 

 general color, however, more sordid, the lighter shades inclining to pale 

 fulvous, with a slightly golden sheen. Primaries more acuminate at apex, 

 and marked with black scales, taking on, in a very general and indefinite 

 way, the pattern of those of reticulatus. Secondaries also more acuminate 

 at tip and blacker. Fringes of all wings black. Under surfaces fuligi- 

 nous, with the faintest trace of pale marks on the costa of primaries. 

 Anal claspers of male short, recurved upward, with a rather angular pro- 

 duction on the inferior margin, and with three minute, but distinct, black 

 teeth. There is also a similar black tooth on the inner margin near the 

 tip. Ovipositor of female similar to that of reticulatus. 



Some of the darker specimens present an almost black appearance, the 

 black marks inclosing narrowed, luteous spaces, which appear like so 

 many spots. 



Described from 20 males and 5 females, none of them in perfect condi- 

 tion. 



CONCLUSIONS. 



The additional facts which I have thus presented upon this 

 subject of Yucca insects and V'ucca pollination serve to confirm 

 the generalizations which I have already indulged in. So far as 

 variation is concerned they add still further links to the chain 

 of alliances between the different forms of this interesting family, 



