62 MEMOIRS ON THE COLEOPTERA 



resemblance and are scarcely distinguishable superficially, having 

 about the same size, the same sculpture and great similarity of 

 outline, though in peregrinator the head and prothorax are relatively 

 a little smaller and the hind tarsi evidently shorter; but, on examin- 

 ing the last ventral segment of the female, which is similarly punc- 

 tate and pubescent in both, I find that the posterior contour is 

 parabolic, with the apex distinctly blunt though rather narrow in 

 carbonata, and triangular, with the apex only very narrowly blunt 

 in peregrinator, as shown by a female before me from the Sierra de 

 Durango. I am therefore inclined to consider carbonata a subspecies 

 of peregrinator. 



The following are two other subspecies of this widely distributed 

 type form: 



Calosoma peregrinator ssp. ingens nov. A little shorter and broader 

 in the hind body than carbonata and somewhat larger in size, with rela- 

 tively distinctly smaller prothorax, which is however similar in form 

 and sculpture; elytra with similar habitus and sculpture; tarsi nearly 

 similar but scarcely so stout, the claws more elongate and more arcuate. 

 Length 26.5-30.0 mm.; width 11.6-12.4 mm. California (San Diego). 

 A single pair from Mr. Ricksecker. 



The fifth ventral of the female is as obtusely rounded as in car- 

 bonata, but the punctures instead of being gradually dense medially 

 and posteriorly, as in that species, are everywhere sparser and 

 stronger, with only a small area near the centre of the disk in which 

 they become smaller and dense. This is a maritime modification, 

 carbonata proper being native to the higher interior regions, espe- 

 cially of New Mexico. 



Calosoma peregrinator ssp. amplipennis nov. Similar to carbonata in 

 color, lustre and sculpture throughout, except that the elytral foveae 

 are larger and more evident; body a little smaller, the elytra notably 

 shorter and broader, distinctly less than one-half longer than wide; head 

 and prothorax a little smaller but of similar outline and sculpture. 

 Length 25.0 mm.: width 12.3 mm. Locality unrecorded. 



The single type is unfortunately a male, for the female, as shown 

 by Fall, is the sex having the distinctive sexual characters in this 

 group; it is quite readily recognizable, however, by its much shorter 

 elytra and is probably from New Mexico or southern Colorado. 



The following belongs to the peregrinator group but is I think 

 specifically different: 



