Vol. XXX] ENTOMOLOGICAL NEWS l8/ 



front feebly impressed, no carina, clypeus deeply semicircularly emar- 

 ginate, antennae with fifth joint suddenly dilated; thorax unicolored, 

 nearly twice as wide as long, apex narrower than base and bisinuate 

 with median lobe projecting forward over head, the base truncate, the 

 sides rather strongly arcuate from base to apex, margin fine, not visible 

 from above, disc convex, coarsely and closely punctate and with squa- 

 mules as on head, the median longitudinal impression well-defined, 

 lateral foveae at base within posterior angles. 



Elytra almost four times length of prothorax, umbqne well devel- 

 oped, sides sinuate before middle, margin serrate posteriorly, disc con- 

 vex, striae with deeply impressed large round and approximate punc- 

 tures, intervals somewhat convex, the alternate more prominent, with 

 double but irregularly placed rows of punctures, the squamules arising 

 from all punctures. 



Body beneath of a brilliant purplish coppery color and densely squa- 

 mulose, coarsely closely punctate in front, much finer posteriorly, the 

 apical segments in the female also quite granulose and furnished with 

 rather long semi-erect silken hair which curves toward the front, the 

 anterior margin of prosternum slightly sinuate, the fifth ventral with- 

 out any trace of subapical carina. Length 7.5 mm., breadth 3 mm. 



This species is most closely related to A. guttifcra Lee. and 

 is no doubt congeneric but is now most decidedly distinct. It 

 differs from guttifcra in being more robust, by having the pro- 

 thorax more grossly punctate, the elytral intervals not flat but 

 somewhat convex, especially the alternate ones, and with a 

 double series of punctures, by having the prosternum of a 

 slightly different type, and by having a dense squamose vesti- 

 ture instead of a sparse hairy one. This vestiture covers the 

 entire under surface in the male and all but the apices in the 

 female, these last segments in this sex having the long silky 

 hair as in guttifcra. This is the species listed by Fall 5 as a 

 variety of guttifcra. I have a number of typical guttifcra in 

 my collection, also several A. vcrsuta Horn, now considered 

 to be the males of the preceding, and have seen numbers of 

 others. They all agree in the essentials of sculpture and vesti- 

 ture and stand well apart from their Arizona relative. Their 

 different areas of distribution also argue in favor of their be- 

 ing different -species. In the genus Acmacodcra the typical 

 Arizona species are most decidedly different from the species 



5 Fall, H. C, Jour. N. Y. Ent. Soc., Vol. vii (1899), P- 21. 



