NORTH AMERICAN COLEOPTERA. 105 



i^ema^e.— Prosteruum as iu the male; tibise are all nearly straight ; last ven- 

 tral segment (174) sinuately truncate with prominent angles, a broad obtuse 

 carina extending from base nearly to apex. 



This is one of the h\rgest species in our fauna and may be at once 

 known by the interrupted margin of the last ventral segment, the 

 edge not being serrate. My first specimen was given me by Dr. C. 

 A. Dohrn, of 8tettin, since which others have been collected by 

 Morrison in Arizona. On comparison with the Saunders collection 

 now in the British Museum it bore the name cosUfrom Chev. The 

 facies of the species is quite unlike our others, and it would not have 

 been introduced in the pi-esent essay except from the specimens col- 

 lected by Morrison. 



Being somewhat in doubt, however, regarding the status of costi- 

 from I communicated with my friend Salle, who, with his usual 

 kindness, sends me a specimen of C. crrea Chev. {mexicana Dej.) 

 with the following remarks : " The C. costifrons Chev. is very near 

 to it (cerea), but the elytral impressions are more round and brilliant 

 golden." From my own comparisons I am satisfied that the chai'ac- 

 ters referred to by Salle are purely varietal, and that costifrons can- 

 not be considered a distinct species. 



Occurs in Arizona, extending as far south as Oaxaca, Mexico. 



36. V. ^eminsita Lee— Form moderately robust, subdepressed, broader in 

 the female, color aliove purple or violet, beneath bright green ; antennae (97) 

 greenish % or purplish 9 i serrate from the fourth joint and slightly more slen- 

 der to tip, the third joint as long as the next three; front dissimilar in the 

 sexes; clypeus (179) with a very broad, but shallow emargination at middle; 

 thorax twice as wide as long, sides narrowed in front, widest one-third from apex, 

 thence obliquely narrowing to the hind angles which are nearly rectangular ; 

 disc moderately convex, slightly irregular, a vague median depression in front, a 

 deeper ])ost-apical oblique impression ; surface coarsely punctate, rather sparsely 

 at middle densely and confluently at the sides; elytra wider than the thorax, 

 parallel,'obliquely narrowing at apical third, the margin serrate, the apices acute, 

 slightly spiniform ; the first costa sharply elevated from apex to middle, the 

 second a little shorter and not joining the first at apex, the third short and 

 scarcely evident, the fourth extending from the apex sharply elevated one-third 

 toward the base ; the basal fovea deep and with a golden spot, the first discal 

 fovea a little in fi-out of middle and interrupting the second costa, second one- 

 third from apex between the second and fourth costse, the third spot nearer the 

 apex between the first and second costfe ; the surface very equally, moderately, 

 densely and coarsely punctured ; body beneath very coarsely, sparsely punctate, 

 the sides of the ventral segments with a di.stinct callosity ; posterior angles of 

 the ventral segments prominent, the margin of the last ventral not serrate, but 

 with a serrate submarginal ridge ; prosternum not lobed in front, the surface in 

 both sexes nearly smooth, with few fine scattered punctures ; tooth of anterior 

 femur relatively small but acute, the distal edge indistinctly crenulate. Length 

 ■76 - .88 inch ; 19 - 22 mm. (Fig. 178.) 



TKANS. AMEE. ENT. SOC. (14) MARCH, 1886. 



