44 PROCEEDINGS OF THE ACADEMY OF 



14. M. laterale (Zimm. MSS.), sp- n. 



This little species is testaceous, tbe elytra, however, have a 

 black subtriangular spot on the external margin; the head is 

 sulcate across the front, but with no medial line; the thorax is 

 made as in M. pellucidus, but is a little shorter, though the sides 

 are similarl}' rounded. L. .11. North Carolina, Kansas. 



[These species of Metachroma are ver}'- hard to separate accu- 

 ratel}', but will, I believe, be found eventually to be really dis- 

 tinct ; they are, as far as I am aware, rare in collections.] 



CoLASPis, Fabr. 



1. C. favosa (Say), J. Acad., iii. 448. 



Entirel}^ metallic blue or green; antennae j'ellowish, red at the 

 base; legs black or brownish; head sparingly punctate; anten- 

 nal tubercles smooth, coppery ; eyes emarginate ; thorax rather 

 transverse, sides broadly rounded, reflexed, somewhat explanate; 

 base rounded, thicklj' and deeply (disk more sparingly) punctate; 

 scutellum smooth, elytra deeply and closely multiseriate punc- 

 tate ; ventral segments alutaceous, hardly punctate, epipleurae of 

 the prothorax punctate. L. .23-.25. 



Southern and Western States. Purple varieties also occur. 



2. C. brunnea (Fab.), Suppl. 94, 4; snilla, Fab., Sys. El., i. 417, 24; lurida, 



Olir. Ent., vi. 892 j flavida. Say, Long's Exp., ii. 295. 



Entirely ochreous or testaceous ; head and thorax as in C. 

 favosa^ except that the sides of the latter are not so broadly 

 reflexed ; elytra with eight smooth subcostate interstices, the 

 punctures between them sometimes uniseriate, and at others 

 irregular or triseriate; thoracic epipleurge punctate. L. 23. At- 

 lantic region. 



Var. cosfipennis. Head and thorax metallic green; elytra 

 brown with four yellow costate interstices. 



Every lead can be found between these extremes. 



3. C praetexta, Say, J. Acad., iii. p. 442. 



Sliapc of C. favosa, above dark copper color, beneath brown; 

 legs and antennae ferruginous ; head sparsel}' punctate, front 

 channelled, antennal tubercles smooth, nearly united across the 

 middle; thorax as in C. /auosa, but less punctate ; elytra irregu- 

 larly and sparsely punctate; punctures sometimes subseriate 

 behind; epipleuris nearly smooth. L. .22-.24. Atlantic region; 



