9G ACADEMY or NATURAL SCIENCES 



Length seven-tenths of an inch. 



Found near the Rocky Mountains. 



[Afterwards described by Dejean as C. hixafum. — Lec] 



2. C. LUXATA. — Brownish-black ; elytra reticulate ; head and 

 thorax minutely punctured. 



Inhabits Arkansa,. 



Mandibles flattened above, rugose, with oblique lines : head 

 punctured : antennEe, second joint half as long as the third : tho- 

 rax minutely punctured, punctures larger and confluent on the 

 lateral margin; posterior angles rounded, extending backwards a 

 little beyond the basal line ; an impressed longitudinal line : 

 elytra suborbicular, reticulate ; longitudinal lines not more dila- 

 ted or profoundly impressed than [150] the transverse ones, which 

 are not continuous, the points of intersection not distinguished by 

 a puncture ; the three punctured striae obsolete, their traces hard- 

 ly discernible in a certain light and not diff"erently colored. 



Length more than three-fifths of an inch. 



This insect has the short, transverse thorax of Calosoma, but* 

 the proportions which the joints of the antennae bear to each 

 other are similar to those of many Carahi : the transverse lines 

 are dislocated by the longitudinal ones. 



[Belongs to Caltsfhenes : which however is not now adopted by 

 many entomologists. — Leg.] 



CARABUS Linn. Latr. 



0. EXTERNUS. — Winged, black, margined with purplish ; 

 elytra with three series of obsolete punctures. 



Length one inch and three-twentieths. 



Body elongated, deep black : antennae brown at tip ; thorax 

 punctured, margined with bluish-purple ; lateral edge regularly 

 curved to the base : dorsal and basal lines distinct; basal angles 

 obtusely rounded ; elytra striate ; striae well impressed, much nar- 

 rower than the interstitial lines, and with conspicuous, definite 

 punctures; interstitial lines convex, equal, the fourth, eighth, 

 and twelfth each with a series of obsolete small punctures, which 

 do not interrupt them ; exterior margin bluish-purple. 



A large species, brought from Arkansa by Mr. Thomas Nut- 

 tall. It somewhat resembles C. sylvosus, but is larger, the strisc of 

 the elytra are much more regular, exhibiting nothing of the gran- 



[Vol. III. 



