OP PHILADELPHIA. 285 



obsolete nervures ; the anterior band is rather before the middle, 

 but does not extend to the scutel; it is undulated, and does not 

 reach the suture ; the spot at tip is somewhat [178] renifonn or 

 trilobate, and does not reach the edge or suture : beneath pi- 

 ceous : feet above black : postpectus yellow sericeous. 



Length more than nine-tenths of an inch. 



It differs from marginatus Fabr., particularly in the rounded 

 form of the thorax, which in that species is much narrowed be- 

 hind : the elytra of marginatus have a rufous exterior margin, 

 the basal band is not interrupted by the suture, and embraces 

 the tip of the scutel ; there is also a band at tip. The colors of 

 the antennae are arranged exactly as in vespillo Fabr., but the 

 thorax is much more accurately rounded, and the elytral mark- 

 ings are different. The rotundity of the thorax is more com- 

 plete than even that of mortuorum Fabr. The species occurs in 

 the N. W. Territory : it is very rare in the Middle States. I 

 have received a specimen from Dr. T. W. Harris of Milton, 

 Massachusetts. 



NITIDULA Fabr. Dej. 



1. N. 6-MACULATA.— Blackish, with a broad pale rufous mar= 

 gin and elytral spots. 



Nitidula Q-niaculata Melsh. Catal. 



Body blackish'brown or deep piceous : antennre pale rufous : 

 thorax with a dilated pale rufous margin : elytra with a dilated 

 pale rufous margin ; an angulated line in the form of a U at 

 base, a small spot on the submargin, sometimes connected with a 

 line which runs towards the tip, and becomes confluent with the 

 lateral margin ; an angulated or rounded spot [179] behind the 

 middle, rufous : beneath piceous : feet paler. 



Length more than a quarter of an inch. 



The rufous angular line at the base of each elytron, in the 

 form of the letter U, is a striking character. 



[Belongs to Lobiopa Er. — -Leo.] 



2. N. ZIGZAG. — Black-brown ; elytra with an angulated band. 

 Body dark-brown or blackish, with numerous prostrate hairs : 



antennae piceous, two basal joints rufous : thorax with a rufo- 

 cinereous lateral margin : elytra without striae, an obsoletely rufo- 

 cinereous margin ; on each is one or two obsolete rufous spots at 

 1825.] 



