NORTH AMERICAN COLEOPTERA. 107 



Female: — Prosternum as in the male, but less punctured at the front angles : 

 anterior tibia slightly arcuate, the inner edge not serrulate; middle tibia arcuate 

 and finely serrulate within,, the posterior straight; last ventral (186) strongly 

 carinate at middle, the apex truncate with acute angles ; last dorsal more coarsely 

 and densely punctured than in the male, entire. 



This species has the same general characters as gemmata and acuti- 

 pennk, resembling the former, especially in form, but is a little more 

 robust and with fewer and less distinct elytral spots, the surface color 

 being also ditierent. From the latter it differs in its stouter and 

 more robust form and the absence of median depression of the thorax. 



For specimens I am indebted to the kindness of Mr. Aug. Merkel, 

 of New York, to whom I take great pleasure in dedicating it. 



Occurs in Texas and Arizona. 



38. < -. aeutipeiiiii!^ Chev.— Form moderately elongate, dark bronze, feebly 

 shining ; anteimaj gradually more slender to tip, the third joint a little longer 

 than the next three, joints four to eleven testaceous % or brownish J ; front 

 rather flat, densely, coarsely punctured, a little more irregular in female, an 

 elevated chevron near the top ; clypeus (189) very broadly triangularly emar- 

 ginate at middle, on each side arcuate ; thorax nearly twice as wide as long, 

 widest one-third from apex, the sides in front rather suddenly narrowed, poste- 

 riorly straight and gradually narrowed ; disc moderately convex, a very vague 

 median depression, a deeper oblique post-apical depression and another parallel 

 with but distant from the lateral margin ; surface sparsely punctate at middle, 

 more densely near the base, coarsely confluently at the sides and a small, oval, 

 fi7iely and densely punctured space in front ; elytra a little wider than the thorax, 

 parallel, obliquely narrowed at apical third, the margin .scarcely serrate, the 

 apices separately acute ; disc feebly convex, the first two costse long, the third 

 .short and median, the fourth visible at apical third, two distinct braissy fovefe, 

 one transverse one-third from apex between the second and fourth costse, a second 

 a little in front of middle between the first and third, dividing the second costa 

 and a very small spot a little more anterior between the first and second co.stse, 

 the surface moderately coarsely punctured, more densely near the apex, basal 

 fovea rather deep : body beneath seneous, greenish in front ; abdomen coarsely 

 not closely punctate, the lateral callosities of the ventral segments feeble, the 

 hind angles slightly prominent ; last ventral with entire lateral margin ; pros- 

 ternum not lobed in front; anterior femur with a relatively small tooth, not 

 denticulate. Length .44- .70 inch : 11-17.5 mm. (Fig. 188.) 



Male. — Prosternum smooth at middle, moderately densely punctured at the 

 sides and slightly pubescent; anterior tibise (192) slightly arcuate ; feebly dilated 

 at tip, the inner edge finely serrate near the tip ; middle tibise slightly arcuate 

 and serrulate within ; posterior tibia" straight ; last ventral segment (190) deeply 

 quadrangularly emarginate, along the middle broadly sulcate. 



Female. — Prosternum almost entirely impunctate ; anterior tibise feebly arcuate, 

 the middle and posterior straight ; last ventral (191j longer than in the male, the 

 sides slightly sinuate, the apex truncate with prominent angle.s, the median line 

 rather strongly carinate. 



