HETEROMERA. 519 
Argoporis atripes (p. 95). 
To the Mexican localities given, add:—Villa Lerdo in Durango, Aguas Calientes city, 
Lagos, Sayula in Jalisco (Hége). 
Sent in abundance from Aguas Calientes. 
Argoporis cavifrons (p. 95). 
To the Mexican localities given, add :—Mazatlan ({6ge). 
Argoporis costipennis (p. 96). 
Argoporis costipennis (Lec.), Casey, Ann. N. York Acad. v. p. 405, t. 4. fig. 10 (¢) (Nov. 1890). 
To the localities given, add :—Muxico, Northern Sonora (Morrison). 
8. Argoporis unicalcarata. 
Moderately convex, black or pitchy-black, slightly shining. Head rather short, bread, strongly reflexed at the 
sides in front, thickly and very irregularly punctured, the punctures on the epistoma fine, the others 
moderately coarse ; antenne stout, rather short ; prothorax as long as broad, convex, rounded at the sides 
anteriorly and gradually narrowing behind, widest before the middle, the base and apex about equal in 
width, the angles obtuse, the base broadly, feebly emarginate, the surface very minutely, closely, uniformly 
punctured ; elytra elongate-oval, with rows of moderately coarse, not very closely placed punctures, the 
interstices very minutely, somewhat closely punctate, flat, the first, third, and seventh very strongly and 
abruptly carinate near the apex (the first and seventh projecting beyond the apex of the elytra when the 
insect is viewed from above), the humeridentiform, very prominent ; beneath longitudinally wrinkled and 
with some scattered punctures; legs pitchy-red; prosternum decliyous behind the cox, strongly produced, 
the apex vertical. 
g. Anterior femora sharply carinate on the inner side towards the base; anterior tibie curved, denticulate 
within ; posterior femora incrassate beyond the middle and armed with a single long, stout, blunt tooth; 
first ventral segment with a rounded, flattened tubercle in the middle. 
Length 12-13 millim. (¢ 9.) 
Hab. Mexico, Villa Lerdo in Durango, Aguas Calientes city (Hoge). 
Three males and two females. This species resembles A. costipennis in its male 
characters. ‘The elytra, viewed from above, appear to be quadri-tuberculate at the 
apex. 
9. Argoporis tridentata. 
Moderately convex, black or pitchy-castaneous, slightly shining. Head coarsely punctured between and behind 
the eyes, the anterior portion very minutely punctate, the sides strongly reflexed ; antenne stout, rather 
short; prothorax convex, as long as broad, widest at one-third from the apex, the sides rounded anteriorly, 
gradually converging and slightly sinuate behind, the base feebly emarginate and sometimes narrower than 
_ the apex, the anterior angles obtuse, the hind angles distinct, the surface exceedingly minutely, somewhat 
thickly, uniformly punctate; elytra elongate-oval, with rows of coarse, deep, rather distantly-placed 
punctures, the interstices sparsely, exceedingly minutely punctate, flat or very feebly convex, the first, 
third, and seventh feebly costate at the apex, the humeri dentiform, very prominent; beneath longitudi- 
nally wrinkled ; legs black or pitchy-red ; prosternum declivous behind, produced, the apex vertical. 
¢. Anterior femora with a short subangular carina on the inner side near the base; anterior tibiee curved, 
denticulate within ; intermediate femora obsoletely denticulate in the middle; posterior femora incrassate 
3 XX 2 
