Mar. i?99] FaLI, : On AMERICAN SPECIES OF ACM.'EODERA. 11 



Other in our fauna. The first named character is shared by clausa, 

 and the last by cubcecola. Length, lo— ii mm., .40-. 44 inch. 

 Habitat: California (Owen's Valley). 



A. clausa Horn, Proc. Cal. Acad. Sci., 1894, p. 374. PI. VII, 



Fig. 3- 



A pretty species, of medium size, and having no close allies. Its 

 distinctive character lies in the fact that the side margin of the thorax 

 is more clearly visible from above toward the base than in front, a re- 

 versal of the ordinary condition and noted elsewhere only in robusta. 

 The elytra have more often a bluish rather than a bronze luster, as de- 

 scribed by Horn, and the thorax is invariably a little wider at base 

 than the elytra. I have, therefore, removed it from the neighborhood 

 of tuta and liepburnii, with which it is associated in the description. 

 The prosternal margin is feebly trisinuate ; the apical plate large, its 

 free edge rather thin and evenly rounded. Length, 7.8-10 mm., .31- 

 .40 inch. 



Habitat : Cape region of Lower California. 

 A. convicta, sp. nov. 



Moderately slender, depressed, distinctly bronzed, thoracic margin rather broadly 

 yellow from apical fourth to base, the yellow spot a little broader behind. Elytra 

 with four transverse fasciae as follows : the first, subbasal, extending from the scutellar 

 region obliquely outward and backward to margin ; second, median, posteriorly 

 curved ; third, at apical third, oblique ; fourth, subapical ; the last two broken. In 

 addition there is a minute spot beneath the humerus, a narrow marginal stripe between 

 the first and second fasciae, a small marginal spot between the second and third fascia; 

 and a small apical spot. Head rather deeply longitudinally impressed, vertical carina 

 feeble. Thorax very slightly more than twice as long as wide, widest at basal two- 

 fifths where it is very slightly wider than the elytra, moderately narrowed in front, 

 side margin inferior except toward the apex, surface moderately closely but not densely 

 punctate. Elytra feebly striate on the disk, more deeply at sides and tip, intervals 

 uniseriately punctulate. Hairs of upper surface short, brownish. Beneath bronzed, 

 abdomen with slight violaceous lustre, evenly, not very closely punctate and clothed 

 with short gray hairs. Front margin of presternum rather feebly trisinuate ; last 

 ventral with wide apical plate, the free edge broadly evenly rounded ; tarsi distinctly 

 longer than half the tibi?e. Length, 8 mm., .32 inch. 



Habitat : Arizona (Santa Rita Mts.).' Oiie specimen, collected by 

 Mr. Wickham. 

 A. \SiX\sXz. Horn, Trans. Am. Ent. Soc, VIII, 1880, p. 148. 



This species begins a series which as a rule are more convex than 

 those that precede ; they also lack the thoracic spot, the front margin 

 of the prosternum is strongly toothed each side, and the apical ventral 

 plate is thicker. 



