716 BOSTON JOURNAL 



that of stdcahis Jur., and the venter is very profoundly excava- 

 ted. The metathoracic spines are very short and obtuse. 



2. C. SERiCEUS nob., {Si^jfu/jihics Long's Ex. to [266] St. Pe- 

 ter's, ii. p. 821.) — Agreeably to the generic characters given by 

 Jurine, this species as well as the following belongs to this genus, 

 on account of the undivided abdomen ; still, however, the denta- 

 tas F., which has two distinct sutures on the tergum, is also re- 

 ferred by some modern naturalists to this genus. 



3. C BAsiLARis nob., {Siycdphm, ibid. p. 322,) much like 

 jjtirvus nob., but is larger, the second joint of the antennae, man- 

 dibles and feet, except at tip, are pale yellowish. 



DIPLOLf:PIS Geoff. Leach. 

 (Antennae filiform, joints cylindric. Three cubital cellules.) 



1. D. ARMATUS. — Black; antennae and feet ferruginous: scu- 

 tel with a conic spine. 



Inhabits Indiana. 



Body black, polished ; antennae ferruginous : first joint not 

 longer than the third, black ; second joint globular, black ; third 

 and following joints cylindrical, subequal; terminal joint rather 

 longest ; scutel with a prominent conic, acute spine ; wings hya- 

 line : nervures pale browni.sh : feet honey-yellow ; venter on the 

 inferior edge honey-yellow ; thorax with two grooves ; collar and 

 first segment of the tergum with close-set raised lines. 



Length to tip of wings three-twentieths of an inch. 



The scutellar spine is very prominent, elevated and obvious, 

 as in Figltes ediogaster Panz., but the thorax is not so much 

 sculptured as in that species. 



2. D. 5-LiNEATUS. — Black ; feet rufous ; scutel with a spine. 

 Inhabits Indiana. [267] 

 Body black, polished ; antennae, first joint rather shorter than 



the third j scutel rough with about five raised lines; at tip a 

 broad, compressed, carinate, subacute spine : wings hyaline : ner- 

 vures brown : pleura and first joint of the tergum with close-set 

 raised lines : feet, excepting the inferior surface of the thighs, 

 dull honey-yellow. 



Length three-twentieths of an inch. 



Aside from the color of the antennae and of the inferior surface 



[Vol. I. 



