72 BULLETIN 48, UNITED 8TATES NATIONAL MUSEUM. 



there is no variation save in the (lei)tli of the i^ronnd ('oh>r, and in a 

 very slight relative diilerenee in the distinctness of the macnlation. 



There is the usual sexual difference in the palpi, those of the male 

 being" obli(pie while those of the female are straigiit. 



I have associated with this species two specimens from Glenwood 

 Springs, Colo., which may prove different wlien larger material is at 

 hand. They are mucli more powdery and seem slighter, yet with i)rac 

 tically the same marlvings as in the eastern specimens. 



Reiiia larvalis, Orote. 



1872. Grote, Trans. Am. Entomological Boc, IV, 26, Jicnia. 



1873. Grote, Trans. Am. Entomological Soc, IV, 303, lienla. 



This in all essentials like R. sohrialls, save that it is i>aler, more 

 liiteous, and the maculation rather more distinct. 



Expanse of wings, 2<S to 30 mm.^1.12 to 1.20 inches. 



Except the somewhat greater size and somewljat paler color 1 can 

 not find any diiierences. Mr. Grote makes the size 32 to 34 nun., whicli 

 is larger than any I have seen, including the tyi^e. I think tliere must 

 be an error in Mr. Grote's measurements of tliese species. I have had 

 no diflficulty in keeping these two forms apart in collections, but 

 can not find a single feature except size and ground color to separate 

 them. Tlie charactcis i)ointed out by Mr. Grote are not constant. 

 The range of the i)resent s[)ecies seems to be greater, extending to 

 Florida and Texas, but there is really no certainty as to which of the 

 two species the records refer to. Specimens from Delaware and 

 Washington, D. C., in May, and Floiida in March are correct, and raise 

 the question whether there may not be a seasonal relation between the 

 s})ecimens taken at Washington in May {R. lari'alis) and those taken 

 in August {R. ii(>hri((lis). My material is not sufi&cient to settle the mat- 

 ter finally, and the species are therefore retained as distinct. 



Renia clitosalis. Walker. 



1859. Walker, Cat. I'.rit. Miis.. lleteroeera, XVI, lOS, Ilcrminia. 

 lSi)3. Smith, BulL U. S. Nat. Mus., 44, 388, L'enia. 



I'en trails, Grote. 

 1S72. (Jrote, Trans. Am. iCutomnlogical Soc.. I^^ 27 and 30i), Heuia. 

 lS!t3. Smith. P.ull. U. S. Nat. ISIus., 11. ;!8S, ].r. syn. 



Very dark smoky l)vown or blackish, sonu'what glossy. Head and 

 thorax concolorous. Primaries with tlie markings faintly traceable at 

 best, sometimes almost obsolete, no feature prominent. Transverse 

 anterior line a little irregular, oblique. Transverse posterior line 

 irreguhxrly denticuhite, with an even ontcurve or a little drawn in on 

 the subtnedian interspace; followed by a vague paler shade, usually 

 marked as a yellowish dot on the costa, and sometimes confined to this. 

 Subferminal line punctitorm, consisting of small white dots wliich bend 

 outwardly below tlu' middle. Sometimes a more or less undefined 



