8 DESCRIPTION OF INSECTS 



audible detonation, with its accompanying cloud of smoke, 

 as in the discharge of a gun. ,. 



Genus Cymindis, 



Anterior tibia emarginate ; elytra, truncated at tip ; exterior 

 maxillary palpi filiform ; labiales terminated by a securi- 

 form joint ; neck none ; body depressed and destitute of 

 the secretory organs which furnish the detonating fluid : 

 nails pectinated. 



Species. 



1. C. *simiatits, black ; feet testaceous; elytra with a pale 

 humeral spot and margin. 



Length, one-fourth of an inch. 



Body punctured, glabrous; antennse, labrum, and palpi 



rufous. 

 Thorax transverse, shghtly contracted behind, lateral edge 



abruptly and minutely excurved behind, forming a minute 



acute angle, basal hues obsolete, basal edge sinuately 



rounded. 

 Elytra blackish brown, with a pale, rufous, humeral spot, 



margin and obsolete gemminate spot behind, strife acute, 



punctured, interstitial lines flat, broad. 

 Postpectus, punctures obsolete. 

 Fett testaceous. 

 Venter impimctured. 

 Found by Mr. J. Gilliams in Maryland. 



2. C. decoriis. Head blue ; thorax rufous ; elyti^a green po' 

 lished. 



Length, three-tenths of an inch. 



Carabus decerns alatus, cyaneus, thorace pedibusque rufis. Fabr. Syst, Eleut. 



