96 ACADEMY OF NATURAL SCIENCES 



Length seven-tenths of an inch. 



Found near the Kocky Mountains. 



[Afterwards described by Dejean as C luxaUim.—LEC.'] 



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

 thorax minutely punctured. 



Inhabits Arkansn. 



Mandibles flattened above, rugose, with oblique lines : head 

 punctured: antennae, 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 strise obsolete, their traces hard- 

 ly discernible in a certain light and not diflFerently 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 Calisthenes : which however is not now adopted by 

 many entomologists. — Lec] 



CARABUS Linn. Latr. 



C. externus. — Winged, black, margined with purplish ; 

 elytra with three series of obsolete punctures. 



Length one inch and three-twentieths. 



Body elongated, deep black : anteungc 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. si/hosus, but is larger, the striae of 

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



[Vol. III. 



