April rSQg.] 



PSYCHE. 



345 



the third as from the first and all are indistinct; tegmina scarcely reaching 

 the hind femora, very obscurely spotted ; no post-ocular stripe upon the head 

 or lateral lobes of the pronotum ; hind tibiae coral red with not a trace of a 

 sub-basal black ring. ....... Impiuiicus Scudd. 



A- Tegmina much shorter than the abdomen. 

 B' Hind tibiae green. 



C ' Tegmina separated by a space greater than their width. Gracilis Brmier. 

 C" Tegmina attingent or slightly overlapping. . . Sylvatictis n. sp. 



B" Hind tibiae red or fuscous. 



C ' Tegmina separated by a space much greater than the width of the frontal 

 costa. ........ Obovatipeiinis Blatchley. 



C^ Tegmina attingent or overlapping. 



D' Hind margin of the pronotum strongly angulate; tegmina decidedly 

 longer than the pronotum and lanceolate. . . . Bacoiii n. sp. 



D'- Hind margin of the pronotum slightly angulate; tegmina shorter tiian 

 the pronotum, sub-elliptical in shape. .... Scudderi Thos. 



Mdaiwphis diffcrcntialis ^7//<v. — This 

 species is apparently uncommon at least 

 in the mountainous part of the State. 

 It is represented in my collection by 

 specimens from Washington, Sebastian. 

 Crawford and Marion Counties. Two 

 specimens from the last mentioned lo- 

 cality collected July twentieth differ 

 rather remarkably from other specimens 

 from Arkansas. They are very dull 

 brown with considerable infuscations, 

 the tegmina being darker in the lateral 

 than in the dorsal field, irregularly 

 clouded over both areas and maculate 

 on the former. The disk of the prozone 

 is distinctly longitudinal and about half 

 as long again as the metazone. The 

 hind femora are shorter than in typical 

 specimens. 



Mehmoplits bivittatus Say. — This very 

 variable species is rare in Northwestern 

 Arkansas. I have collected but four 



males and two females. The males 

 have uniformly red the females purplish 

 hind tibiae. According to Scudder those 

 with the red hind tibiae should be Mel. 

 fc»!oratii.<: Burm. but I am not able to 

 recognize the distinctness of these sup- 

 posed species. Two of the males were 

 captured June twenty-sixth near War 

 Eagle ford on the Spring Valley and 

 Clifty road. Another male was taken 

 near Clifty. The other specimens were 

 captured at several points in Marion 

 County from July tenth to twentieth. 

 Melaiioplus viola Thos. — This spe- 

 cies is abundant in Northern Arkansas 

 and probably throughout the State in 

 suitable localities, which are wooded 

 hillsides and tops. I have thirty-one 

 males and twenty-nine females from 

 Washington, Carroll, Boone, Marion, 

 Newton, Madison and Crawford Coun- 

 ties in the northwestern, and Pulaski 



