1860 BUTTERFLIES BEYOND NEW ENGLAXD. 



and nearly to the apex of the wing, uarrowhig apically ; scales of the same color often 

 line and narrowly mark the nervures, especially the median in its upper field and the 

 subinedian, occasionally also flecking the inner Ijorder. Ilincl winrjs enlivened only by 

 long, olivaceous, tawny hairs which cover profusely the basal third or more of the 

 wing; fringe dark gray from a heterogeneous mingling of scales of many colors, espe- 

 cially pallid and fuliginous. 



Beneath: /ore loino-f very dark brown, the costal border liroadly margined with very 

 dull, mingled pallid and dull tawuy scales, the former preponderating next the costal 

 edge itself and also found marking all the nervures, even those which cross the dark 

 brown parts of the wing; the outer margin in the subcostal and median region rather 

 broadly and very heavily flecked with similar scales. Hind loings with the basal color 

 of the same dark brown as the fore wings, but above the middle of the medio-subme- 

 dian interspace very heavily flecked with white scales which always distinctly mark 

 all the nervures and occasionally cover almost all the intervening interspaces; oc- 

 casionally away from the nervures changing to a pale yellow, a color which edges the 

 costal margin in its basal half. Expanse of wings, 31-3-t mm. 



This is a western butterfly, occurring in northern Illinois, Iowa and 

 Nebraska, and also in Dakota, and according to Edwards in Montana and 

 Colorado, though it may j^erhaps be questioned whether the neighboring 

 O. garita be not here mistaken for this species, though Mead says it is not 

 garita but perhaps a variety of powesheik which is found in the Yellow- 

 stone region of JNIontana. It flies in Iowa, Nebraska, and Dakota at the 

 end of June according to Parker and Dodge, but nothing further is kno«n 

 about its history. 



POTANTHUS SCUDDER. 



Potanthus* Scudd., Syst. rev. Amer. butt., 54 (1S72). Paniphila par-s Auctorum. 



Imago. Head large, unusually broad. Front but little tumid, nearly four times as 

 broad as higli, but little, and only below, advanced in front of the eyes. Eyes large, 

 moderately full, circular, naked. Auteunae separated at base by much more than the 

 face-breadth of the eyes, much longer than the abdomen, the slender stalk consisting 

 of about twenty joints, the longest in the middle five times as long as broad, the club 

 gradually and regularly inorassated (but incomplete in all specimens seen). 



Fore wing slightly more than half as long again as broad, the lower outer angle fall- 

 ing well l)eyond tlie middle of the costal border ; costal margin tolerably straight, ex- 

 cept at base and extreme tip ; outer margin gently convex. Costal nervure scarcely so 

 long as the cell ; third subcostal nervule arising liardly beyond the middle of the wing ; 

 cell a little less than two-thirds as long as the wing, fully five times as long as broad; 

 first median nervule arising midway between the base of the wing and the second ner- 

 vule, and very far before the origin of the first subcostal nervule. Hind wing well 

 rounded, not elongate, only a very little longer than broad; outer margin regularly 

 convex. First median nervule arising but little nearer the base than the subcostal fork. 



Middle tibiae about five-sixths the length of the middle femora, and not greatly longer 

 than the first tarsal joint, armed at tip with a pair of exceedingly long and slender spurs ; 

 first joint of tarsi as long as the next three together, the last joint no longer than the 

 fourth, all armed beneath rather feebly with delicate, recumbent spines. Claws minute, 

 strongly arcuate, no longer than the thickness of the joint. Paronychia inferior, 

 lateral, even slenderer than the claw, slightly shorter, a little arcuate, hardly taper- 

 ing. 



*Tn.'v«, avBos, one that drinks at a flower. 



