764 BOSTON JOURNAL 



species I have seen, and the much more dilated bands of the ter- 

 gum are distinctive. 



PHILANTHUS Fabr. Latr. 



P. SOLI VAGUS. — Black, with small punctures ; tergum fasciate 

 on each segment. 



Inhabits Indiana. 



% Body black ; punctures numerous, small : hypostoma, an- 

 terior orbits, to the emargination, aud large spot above the inser- 

 tion of the antennae yellow : collar, margiu yellow, slightly in- 

 terrupted in the middle : stethidium immaculate : wing-scale 

 yellow : wings very slightly tinged with dusky ; nervures fus- 

 cous, towards the base and stigma honey-yellow : tergum, seg- 

 ments having each a greenish yellow band on the posterior sub- 

 margin, that of the first segment largest, the others subequal j 

 sixth segment immaculate : pleura, pectus and venter immacu- 

 late : knees, tibiae and tarsi yellow : posterior pair of tibiae with 

 a spot on the posterior tip and their tarsi above tinged with fer- 

 ruginous. 



Length two-fifths of an inch. 



RYGCHIUM Spinola. 



1. R. BALTEATUM. — 9 Black, thorax and head varied with 

 ferruginous ; tergum with a yellow band. 



Inhabits Indiana. [384] 



Body black, punctured : head ferruginous ; region of the 

 stemmata, black : antennas black, first and second and half of 

 the third joints ferruginous : thorax with a broad ferruginous 

 margin, including the scutel, and with more or less of ferrugin- 

 ous in the middle ; anterior margin with a slender yellow line 

 interrupting the ferruginous margin : wings black-violaceous : 

 feet yellowish : thighs dusky at base : tergum, first segment im- 

 punctured, on the posterior margin a yellow band abruptly dilated 

 each side ; second segment slightly punctured at base, posterior 

 indented, with large punctures, and dull ferruginous; remaining 

 segments punctured. 



Var. a. Behind the scutel a transverse, yellow, abbreviated 

 line. 



[Vol. I. 



