668 BOSTON JOURNAL 



At first sight, without inspection of its generic characters, it 

 might be mistaken for a Lema. 



2. G. CAVA. — Head with one, thorax with two impressed 

 dots. [199] 



Inhabits Mexico. 



Head punctux*ed, sanguineous, beneath the antcnnse whitish ; 

 vertex with an impressed dot : antennae fuscous, or bhickish, 

 basal joints whitish beneath : thorax sanguineous, punctured, 

 with two indented dots: elytra densely punctured, with a common 

 suture and vitta blue, the latter originating on the humeral tu- 

 bercle and abbreviated before the tip : pectus ferruginous : post- 

 pectus and venter black ) feet white. 



Length one-fifth of an inch. 



Distinguishable from other species by the indentations of the 

 head and thorax, combined with the elytral vittae and irregular 

 puncturing. 



The G. vittatu Fabr. is common in Mexico. 



ALTICA Geofi". 



1. A. MELLICOLLIS. — Head black ; thorax yellowish ; elytra 

 blue. 



Inhabits Louisiana. 



Head blue-black, with rather large punctures each side, be- 

 tween the antennae convex, dark piceous : antennae black brown, 

 three basal joints honey -yellow beneath : palpi black : thorax pale 

 honey-yellow, punctures not obvious : scutel impunctured : elytra 

 dark violaceous-blue, with numerous, small, distant, not profound 

 punctures : pectus yellowish : postpectus blackish : venter black- 

 ish, last segment dull yellow : thighs honey-yellow : tibiae black, 

 yellowish at base : tarsi black. 



Length nearly one-fifth of an inch. 



Related to collark HHg., and collata Fabr., and particularly the 

 latter, from which it may be distinguished by its blue elytra and 

 immaculate face. A specimen was sent to me by Mr. Barabino, 

 from New Orleans. [200] 



2. A. CRENicoLLis. — Ycllowish ; thorax five-spotted ; elytra 

 with black vittae. 



Inhabits Mexico. 



[Vol. I. 



