374 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



male genitalia, the normally uniformly red head and the red front 

 femora all indicate a close affinity with D. rujlpes, and there seems 

 but little doubt that they have had a common ancestry. They have, 

 however, diverged sufficiently and are distinct enough to warrant 

 specific rank. 



The principal variation observed was in the intensity of coloration 

 and in the contrast between ground color and pattern of the elytra. 

 Many specimens were encountered in which the pattern was obscured 

 by an overall darkening of the ground color. D. bicoloriceps Pic was 

 described as having the head red behind and dark in front, an un- 

 usual but quite normal variation m D. nigronotata. 



Types. — In the private collection of M. Pic of Paris, France. Iden- 

 tification of the initial specimens encoimtered in this study was ver- 

 ified by Mr. Pic himself. Type locality, "Floride." 



Specimens examined. — From the following localities, 190: 



United States: Alabama (Spring Hill). Arkansas (Hope). Florida (Dune- 

 din). Indiana. Iowa (Mount Vernon). Georgia (Athens, Atlanta, Dunwoody, 

 Thomasville) . Kansas. Louisiana. Maryland (Baltimore). Minnesota (Hous- 

 ton Co., Ramsey Co.). Mississippi (West Point). Missouri (Columbia). Ohio 

 (Champaign Co., Hocking Co., Scioto Co.). Oklahoma (JMcCurtain Co.). 

 Pennsylvania (Jeannette). South Carolina (.Jackson). Texas (Brownwood, 

 College Station, Dallas, Kingsville, Victoria, Colorado Co., Eastland Co.). West 

 Virginia (White Sulphur Springs). 



Genus Neomida Latreille 



Neomida Latreille, 1829, p. 29.— Mulsant, 1854, p. 217.— Seidlitz, 1894, pp. 528, 



532. 

 Hoplocephala Laporte and BruUe [scr. Oplocephala] 1831, p. 338. — Laporte, 1840, 



p. 222.— Redtenbacher, 1845, p. 128; 1849, pp. 52, 590; 1858, pp. cvi, 604; 



1874, pp. ii, cxviii, 105.— Mulsant, 1854, p. 215.— Lacordaire, 1859, p. 302.— 



Thomson, 1859, p. IIG; 18G4, p. 248.— Jacquelin du Val, 1861, p. 295.— Horn, 



1870, p. 379.— LeConte and Horn, 1883, p. 383.— Seidlitz, 1875, p. 96; 1891, 



p. 131; 1894, pp. 509, 526.— Gebien, 1925, pp. 143, 448. 

 Arrhenoplita Kirby, 1837, p. 235.— Champion, 1886, p. 175. — Reitter, 1911a, 



pp. 331, 340. 

 Evoplus LeConte, 1866, p. 128.— Bates, 1873b, p. 234. 



Type species. — Ips haemorrhoidalis Fabricius (monobasic). 



Body usually elongate, cylindrical, strongly convex. Head of 

 males mth horns or tubercles either on frons or clypeus or on both; 

 head of female usiuxlly simple; eyes large, broadly but shaUowiy 

 emarginate anteriorly; antenna usually with all but basal three or 

 four segments strongly transverse, about twice as broad as long, 

 forming a loose club; terminal segment of maxiUary palpus elongate 

 oval, cylindrical, obliquely truncate or rounded apically. Prosternal 

 process convex between front coxae, strongly declivitous immediately 

 behind them, apex usually concealed; mesosternum rather flattened, 



