OP PHILADELPHIA. 175 



Found near Engineer Cantonment on the Missouri river. The 

 caudal processes are peculiar to one sex. 

 [Belongs to Listroderes. — Leg.] 



2. K. ARMICOLLIS. — Rufous ; anterior thoracic angles with 

 small spines. 



Inhabits Missouri. 



Body rufous, punctured ; head punctured ; an obsolete im- 

 pression between the eyes ; a dilated, impressed, abbreviated line 

 over the insertion of the antennae sometimes obsolete or wanting : 

 thorax with much dilated confluent punctures ; a polished longi- 

 tudinal line near the middle ; anterior angles with small erefct 

 spines, of which the anterior one is largest ; posterior angles 

 slightly excurved, anterior and lateral margins dull rufous ; elytra 

 light rufous, profoundly striated ; striae with approximate punc- 

 tures : thighs with a robust spine beneath, near the tip. 



Length from the eyes to tip of the elytra one-fifth of an inch, 



Var. a. Thorax and beneath, excepting the feet, black. 



Very closely allied to CurcuUo harhltus of Melsheimer's 

 Catalogue, a species which is entirely black, whereas the elytra 

 of armico^/ts are always [313] rufous. I obtained it on the 

 banks of the Missouri, and Mr. T. Nuttall presented me with nu- 

 merous specimens from the same country. 



[A species of 3Iagdal{mis. — Leg.] 



3. E.. LiNEATicOLLis. — Thorax with longitudinal, confluent 

 lines ; elytra with elevated, acute, alternate, interstitial lines and 

 double series of punctures. 



Inhabits Arkansa. 



Body black : head with dense, robust, short, prostrate, yellow 

 hairs above ; a carinate line from between the eyes to the middle 

 of the rostrum : eyes approximate : rostrum from the base to the 

 middle marked by about six impressed lines : thorax with nu- 

 merous, elevated, longitudinal, confluent lines ; a transverse, in- 

 dented, anterior submargin ; elytra with double series of large 

 profound punctures, the interstitial lines elevated and very 

 acutely edged : thighs one-toothed ; posterior tibia one-toothed 

 near the posterior tip, and ciliated between the tooth and tip. 



Length (excepting the rostrum) nearly three-tenths of an inch. 



Found near the Rocky Mountains. 



[Belongs to Rhi/ssematus ; vide ante 1, 279, 295. — Lec.] 

 1824.] 



