RILEY — GENUS PRONUBA ; FERTILIZATION OF YUCCA. 



55 



On a new Genus in the Lefidofterous Family Tineid^e, 



with Remarks on the Fertilization o/"Yucca. 



By Charles V. Riley. 



PRONUBA. Nov. Genus. 



Generic Characters. — Front ivings (Fig. i, h) elliptical, the apex 

 subacuminate; disc closed, though somewhat indistinctly between marginal 

 veins. 5-8; 12-veined exclusive of submedian (i«) ; costal vein stout, con- 

 nected with subcostal near 

 base and not extending 

 beyond middle of wing ; 

 the subcostal vein sends, 

 from about one-fourth its 

 length from base, a branch 

 which reaches costa where 

 the latter commences to 

 round off; it also sends, 

 from about the middle of 

 the wing, a branch through 

 the discal space, forming 

 an accessory discal cell, 

 and sometimes considera- 

 bly passing the disc and forking outside so as to torm marginal veins 7 and 

 8, though more often forking just at the transverse discal vein ; a feeble 

 disco-longitudinal veinlet starts independently near the base, forks near the 

 middle, and forms a second accessory discal cell ; submedian vein distinct 

 only near the margin, and indicated by an opaque line along the basal half 

 of the fold; internal vein feeble, and bifid at basal third. Hi?id wings (Fig. 

 1,/) broad, subacuminate at tip; shoulder slightly produced and armed, 

 in the $, with a long spine, and in both sexes with a tuft of long scales ; 

 8-veined, exclusive of submedian (ia) which is distinct; disc entire; costal 

 vein extending three-fourths the length of wing; an independent, feeble, 

 disco-longitudinal veinlet, forking about the middle of the wing, the upper 

 branch sometimes considerably passing the disc and then forking into mar- 

 ginal veins 5 and 6, but more often forking at transverse vein ; internal 

 vein feeble and simple. Head (Fig. 1, a, $ ) free, sparsely haired ; epicrani- 

 um flattened or depressed ; ocelli obsolete ; clypeus large ; eyes round and 

 salient; antenna; filiform and simple in both sexes, nearly one-half as long 

 as front wing, the basal joint long, bulbous, and twice as stout as the oth- 

 ers; maxillary palpi (Fig. 1, b) very long, 5-jointed, the basal joint in the 

 $ produced into a long, stout, cylindrical, prehensile tentacle, armed with 

 spines springing from flattened tubercles (c); this joint in the $ a mere 



* Explanation of Fig. 1. — a, denuded head parts; b, maxillary palpus ° ,' c, tuber- 

 cle on same; d, maxillary palpus f ; e, wing scale;/, front leg; g, labial palpus; h, de 

 nuded front wing; ;', denuded hind wing; j, ovipositor — all enlarged. 



