NORTH AMERICAN COLEOPTERA. 73 



posterior tibise straight ; prosteriium smooth at middle, pubescent at the sides ; 

 last ventral segment (3) deeply, almost senii-circularly emarginate ; last dorsal 

 with serrate margin, slightly notched at middle. 



Female. — Front slightly convex, sparsely pubescent, an arcuate ridge above 

 each antennal fossa and a chevron at middle above ; anterior tibiaj arcuate, not 

 serrate within ; middle tibise feebly arcuate, not serrate ; posterior tibise straight ; 

 prosternum smooth at middle, very slightly hairy at the sides ; last ventral seg- 

 ment (4) carinate at middle, ajiex sinuately truncate, with the angles slightly 

 acute ; last dorsal truncate and broadly emarginate, carinate, the edges feebly 

 serrate. 



Ill both sexes the anterior femora are rather obtusely toothed, the 

 tooth serrate on its entire edge ; the posterior edge of the lower 

 side of both the middle and posterior femora is coarsely serrate 

 in its entire extent. The first ventral segment is broadly sulcate at 

 middle, the following segments flattened. 



There seems to be very little variation in this species. Usually the 

 first and second elytral costaj are alone distinct ; in some specimens, 

 however, there are traces of the third and fourth near the apex. 



Occurs in Texas and Mexico. 



2. C oetooola Lee. — Form moderately elongate, subdepressed, narrower at 

 apical third ; color above dark olive bronze or slightly reddish, feebly shining, 

 beneath seneous, the median line greenish or slightly bluish ; front rather flat, 

 coarsely, densely punctured, with two chevrons in 9 which are very indistinct 

 or absent % ; clyjieus broadly but not deeply emarginate ; thorax nearly twice 

 as wide as long, slightly wider between the basal than the apical angles, widest 

 one-third from apex, where the sides are angulate then straight and slightly nar- 

 rowing to base ; disc regularly convex without depressions or elevations, coarsely 

 but not densely punctate at middle, very densely and rugosely at the sides ; ely- 

 tra wider than the thorax, parallel in front, narrowing at apical third, the me- 

 dian basal depression deep, with a golden spot, humeral depression feeble ; three 

 discal golden fovese on each elji;ron, the first one-third from base intermixing 

 the second costa ; the second one-third from apex interrupting the third costa ; 

 the third one-fourth from apex between the first and second costse ; the first ely- 

 tral costa elevated, extending three-fourths to base, the second longer, but less 

 distinct, third short, fourth feebly indicated ; surface coarsely and densely punc- 

 tured except near the scutellum ; lateral margin serrate in nearly its entire ex- 

 tent, the apices separately rounded ; body beneath much more shining than above 

 and metallic seneous or cupreous, coarsely but very sparsely punctate, each ven- 

 tral segment with a smooth triangular umbone ; prosternum very slightly lobed 

 in front. Length .40 - .60 inch ; 10 - 15 mm. ( Fig. 6. ) 



Male. — Head green, chevrons usually wanting, at most but one present; an- 

 tennae metallic green, the joints four to eleven gradually narrower; anterior 

 femora (10) stout, strongly toothed, the tooth serrate on its distal edge ; anterior 

 tibia arcuate, not broader at tip, with about five fine denticulations on the inner 

 side; middle tibise slightly arcuate, the inner edge denticulate, the posterior 

 straight ; prosternum smooth at middle, coarsely punctured at the sides ; last 

 ventral (8) segment nearly semi-circularly emarginate, an intra-marginal serrate 

 edge ; last dorsal coarsely not closely punctate, a slight notch at apex. 



TRANS. AMER. ENT. SOC, (10) MARCH, 1886. 



