DIAPERINI NORTH OF MEXICO — TRIPLEHORN 377 



World, mostly from the tropics. Many species which apparently are 

 undescribed have been examined durmg the course of the present 

 study so that the above figure has little meaning. The genus is 

 unquestionably of tropical origin. Only 1 species, A^. hicomis, in- 

 vades the Nearctic Region to any appreciable extent, and in the 

 Palaearctic Region, only 3 species are to be found. Two species 

 are known from America, north of Alexico, while 2 others, both 

 new to science, are of possible occurrence. They are separated in 

 the following key. 



Key to North American Species of Neomida 



1. Epipleura entire; dorsal surface feebly shining and clothed with fine, short 



j'ellowish setae; head armed in both sexes . . . myllocnema, new species 



Epipleura abruptly abbreviated at or slightly beyond last ventral abdominal 



sternite; dorsal surface strongly shining, glabrous; head armed only in 



male 2 



2. Entire dorsal surface reddish brown; head of male with deep, smooth postoc- 



ular pits, frontal horns flattened and curved posteriorly. 



ferruginea (LeConte) 

 Usually entire dorsal surface, but at least elytra, green, blue, or with bronze- 

 green reflections; head of male without postocular pits, frontal horns 

 cylindrical and porrect 3 



3. Male with clypeal tubercles prominent and acute (pi. 6, fig. 63) ; apical sclerite 



of aedeagus broader than long (pi. 6, fig. 61); both sexes with median 

 portions of abdominal sternites moderately coarsely, and densely punc- 

 tured, each puncture bearing a very short seta; widespread and abundant 



in eastern North America bicornis (Fabricius) 



Male with clypeal tubercles short and blunt (pi. 6, fig. 64) ; apical sclerite of 

 aedeagus longer than broad (pi. 6, fig. 62) ; both sexes with median portions 

 of abdominal sternites finely and sparsely punctured, each puncture bear- 

 ing a long, fine, recumbent seta; Central America as far north as the State 

 of Tamaulipas, Mexico aeneipennis, new species 



Neomida bicornis (Fabricius) 



Plates 2 (Fig. 9), 6 (Figs. 61, 63) 



Hispa bicornis Fabricius, 1776, p. 215; 1781, p. 82; 1787, p. 47. 



Hispa cornigera Fabricius, 1781, p. 82; 1787, p. 47. 



Diaperis bicornis (Fabricius), Oliver, 1791, p. 273; 1795, no. 55, p. 6, pi. 1, fig. 4a, b. 



Diaperis cornigera (Fabricius), Oliver, 1795, no. 55, p. 7, pi. 1, fig. 5a, b. 



Diaperis viridipennis Fabricius, 1801, p. 586. 



Blaps metallica Palisot de Beauvois, 1805, p. 139, pi. 30b, fig. 2. 



Oplocephala viridipennis (Fabricius), Laporte and BruUe, 1831, p. 340. 



Oplocephala virescens Laporte and Brulle, 1831, p. 341. 



Arrhenoplita bicornis (Fabricius), Kirby, 1837, p. 235. — Blatchley, 1910, p. 1261. 



Hoplocephala viridipennis (Fabricius), Horn, 1870, p. 380. 



Hoplocephala bicornis (Olivier), Horn, 1870, p. 380. — Seidlitz, 1894, p. 531. — 



Everts, 1901, p. 258.— Staig. 1940, p. 104, pi. 50. 

 Oplocephala gracilis Motschoulsky, 1873, p. 467. 

 Arrhenoplita viridipennis (Fabricius), Blatchley, 1910, p. 1261. 



