208 NEUROPTERA OF NORTH AMERICA. 



head fuscous, a transverse streak at the base of the antennae, and 

 another, occipital, sometimes absent, black ; antennae fuscous, base 

 and extreme apex yellowish ; prothorax varying in robustness, 

 anteriorly broadest, upon the middle transversely rugose, narrower 

 between the anterior and posterior tubercles, fuscous ; with a 

 broad, transverse, yellow band behind the black anterior margin ; 

 or with a triangular yellow spot at base, before a black band ; or 

 with the middle also yellow; mesothorax fuscous, or fuscous mar- 

 gined with yellow; abdomen fuscous or yellow, base above and 

 beneath black ; anterior feet entirely rufo-fuscous, or with the 

 femora black, tibiae black inside, outside sometimes with a longi- 

 tudinal black stripe ; intermediate feet yellowish-red, with the 

 femora obscure, or yellowish, the femora black, with the apex 

 yellowish; tibiae behind the base, banded with fuscous ; tarsi some- 

 times (perhaps the other sex) with two broad lamelliform, yellow- 

 ish lobes, which are rounded at the apex ; (I have not seen this 

 to be the case but in two specimens ; types of M. brunnea Erich- 

 son, and of Uhler;) posterior feet the same color as the intermediate 

 ones, with no lobes ; wings fuscous, the posterior half hyaline. 



Length to tip of wings 18 34 millim. Alar expanse 30 34 

 millim. 



Hob. North West Territory (Say); N. Illinois (Kennicott) ; 

 Philadelphia (Say); Georgia (Abbot); St. John's Bluff, E. Flo- 

 rida; Fort Steilacoom, Puget Sound; Mexico (Deppe); Central 

 America. 



I have seen many specimens ; I believe the species of Say and 

 Erichson not to be different ; Mr. Say describes both sexes, but 

 does not appear to have observed the remarkable lobes of the tarsi. 



(The tarsal lobes are not characteristic of sex, but are found 

 present in both males and females ; the membranous character of 

 these lobes, and their great delicacy seems to render them liable to 

 disappear, by shrinking or accident; this probably accounts for 

 their absence in most of the specimens observed by Dr. Hagen ; in 

 a specimen which I examined the one middle tarsus had the lobes 

 beautifully apparent, while on the opposite tarsus only a vestige 

 was present ; on another tarsus only a white membrane was appa- 

 rent ; when well conditioned, the lobes are obvious upon both the 

 middle and posterior tarsi. The male has robust, cylindrical, hairy 

 anal appendages, superiorly, which will abundantly distinguish the 

 sex. Uhler.) 



