A REVISION OF THE DELTOID MOTHS SMITH. G5 



^Iiiseum of Natural History. The speciineii from Paiiamiut Valley 

 comes nearest to the Floridiau species in appearance; but the more 

 ample wings will suftice to distinguish the form, oven from the most 

 similar of the other. The structural characters previously described 

 are, of course, decisive whenever a male is at hand. In somewhat 

 rubbed specimens, in which the fringes arc defective, the outer margin 

 of the primaries seems slightly angulated at the middle, and this must 

 be my excuse for referring the species to llitcro<irmnma in the first 

 description from somewhat scant material. It is probable that in its 

 range the species will be found not uncommon. 



Genus R E N I A, Gudik-c. 



1854. Guciu'-e, Species General, Deltoides, 80. 



18."')!». Walker, Cat. lUit. Mus. Heterocera, XYI, 147. 



1877. Grotc, Bull. U. S. Geol. Surv., Ill, 119. 



Head moderate, sometimes quite prominent. Eyes large, naked, 

 globose. Ocelli distinct, set well back from the base of the antenme 

 and close to the compound eye. Front with a pointed interanteiinal 

 tuft. Tongue moderate. Palpi somewhat variable, laterally compressed, 

 directed straight forward, obli({uely ascending or even recurved, sickh;- 

 shaped ; the second Joint longest, clothed on the upper side with upright 

 scales, sometimes evenly, sometimes massed toward the middle, making 

 it seem higher. The terminal joint varies considerably in length, 

 always set into the second at a small angle, and this also quite 

 usually clothed with upright scales, which are longest at the middle, 

 giving the joint a triangular appearance when viewed from the side. 

 Antenna^ long or moderate; in the female simple, with fine lateral cilia- 

 tions; in the male with distinct, though not very long, lateral bristles. 

 Beyond the middle, in this sex, i^ a prominent pointed tuft of hair on 

 the outer side, which conceals an elongated curved joint, which in turn 

 protects a tuft or pencil of si)ecialized hair. Beyond this ]toint the 

 joints of the antenna' become shorter, somewhat serrate, the lateral 

 bristles shorter, and there is a very distinct tendency to a curling or 

 coiling of the tip. Body moderate, abdomen slender, cylindrical, 

 somewhat exceeding the aual angle of the secondaries. The legs are 

 long and moderately stout, the tibia with the normal spurs. In the 

 male the fore legs are modified, the modification confined to the tibia 

 and tarsi. The tibia is very short, anteriorly produced into a h)ng 

 process which covers the first tarsal joint, concealing specialized scales, 

 but no tufts or ])encils of hair. The wings are large; the primaries 

 trigonate, ])ointed at the ai;)ex, the outer margin oblique or arquate, 

 considerable Variation existing in this feature. The venation is sonuv 

 what abnormal, lacking the accessory (;ell in all the species and in all 

 the specimens examined, though I would not be surprised, from what I 

 have seen, to find exceptional si)eL'imens with a more or less ])erfectly 

 developed accessory cell. In most instances veins 7 to 10 are from one 

 stalk; but occasionally 7 is free. 

 7802— No. 4S 5 



