ON A 



NEW GENUS IN THE LEPIDOPTEROUS FAMILY 



TINEIDJE: 



WITH 



EEMAKKS ON THE FERTILIZATION OF YUCCA. 



[Read before the St. Louis Academy of Science, at its regular meeting, September 2nd, 1872.] 



PKONUBA. Nov. Genus. 



Generic Characters. — Front vnngs {Fig. 74, 7t) elliptical, the apex subacuminate ; 

 disc closed, thoiio^h somewhat indistinctly between maro^inal veins 5-8: r2-veined, ex- 

 clusive of subraedian (1 a); costal vein stout, connected with subcostal near base, and 

 [Fig. 74.] 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 

 wincf, »a branch through the discal 

 space, forming an accessory discal cell, 

 and sometimes considerably passing 

 the disc, and forking outside, so as to 

 form marginal veins 7 and 8, though 

 more often forking just at tiie trans- 

 verse discal vein ; a feeble disco-longi- 

 tudinal 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 alons; the basal half of the fold ; internal vein feeble, 

 and bitid at basal third. Hind wings (Fig. 74, i) broad, subacuminate at tip ; shoulder 

 slightly produced and armed, in the cf , with a long spine, and in both sexes with a tuft 

 of long scales; 8-veined, exclusive of submedian, (1 «), 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 marginal veins 5 and 6, 

 but more often forking at transverse vein ; internal vein feeble and simple. Head (Fig. 

 74, a, 2 ) free, sparsely haired ; epicranium flattened or depressed; ocelli obsolete; 

 clypeus large ; eyes round and salient ; antenn;i3 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 

 others ; maxillary palpi (Fig. 74, b) very long, 5-jointed, ^/le basal joint in tJte $ ]iroduced 



