Mar. i899 ] FaI.L : On AMERICAN SPECIES OF ACM/EODERA. 7 



11. Maculation of elytra consisting of numerous very small spots 12 



Maculation of elytra consisting of comparatively few much larger spots. 



Thorax scarcely twice as wide as long, sides parallel in basal half or three 



fourths , recticollis. 



Thorax more than twice as wide as long, sides not parallel or but for a short 

 distance in front of the base. 

 Elytra with a conspicuous discal subbasal spot. 



Upper surface with coppery bronze lustre { .42-.44 inch. ) plagiaticauda. 



Upper surface black with faint bluish lustre (.28-. 36 inch. ) . .jocosa. 



Elytra without discal spot, but witli a lateral series of three or four spots, the 



median largest, the subhumeral small and often wanting . . . .coquillettl. 



12. Elytra strongly sinuate behind the humeri, as wide at apical two-fifths as at base, 



spots very numerous miliaris. 



Elytra moderately sinuate behind the humeri, gradually narrower from base to 

 apex. 



Spots more or less numerous, scattered sparsa. 



Spots comparatively few and tending to coalesce in narrow transverse lines 

 which do not reach the suture angelica. 



13. Last ventral without trace of double apical margin pulcherrima. 



Last ventral with more or less distinct apical plate or crest. 



Apical plate wide, the free edge thin and broadly evenly rounded ; elytra blue 



black with numerous yellow spots Serena. 



Apical plate similar in form but much smaller, surface bronzed. 



Robust more convex, elytra with broad fasciae intenupted at suture . .tuta. 



Depressed, elytra with irregular markings hepburnii. 



Apical crest thick, angulate posteriorly, size small quadriseriata. 



A. cuprina Sj^i/i., Ann. Ent. Soc. Fr., 1838, p. 367. 



No examples of this species so far as I am aware, have been re- 

 ported from our territory, except the single one in the Leconte col- 

 lection, which is said to be froin Texas. There are specimens in the 

 Horn collection from Mexico, and as remarked by that author, it is 

 very doubtful if it should be retained in our list. The rows of very 

 coarse punctures, so closely placed as to nearly obliterate the intervals 

 (except the intra-humeral, which is quite strongly costiform nearly to 

 the tip) give it an aspect which is only in some degree approximated 

 by scapiilaris and cubcecola, two other subtropical forms, occurring re- 

 spectively at Cape San Lucas and in the Florida Keys. Length, 1 1 . 5 

 mm., .46 inch. 



Habitat : Texas ? Mexico. 

 A scapularis Horn, Proc. Cal. Acad. Sci., IV, p. 369, PI. VIII, 



Fig. 6. 



A large species, very strongly attenuate posteriorly, the markings 

 nearly as 'n\ flavosticta. The sudderi narrowing of the thoracic margin 



