XYLOPERTHA.—DINODERUS, 217 
5. Xylopertha quadrispinosum. 
Sinoxylon quadrispinosum, Leconte, New Sp. N. Am. Col. i. p. 100’; Horn, Proc. Am. Phil. Soc, 
1878, p. 543°. 
Hab. Norra America, California peninsula, Cape St. Lucas !, Arizona ?.—Guatz- 
mMALA, Cerro Zunil (Champion). 
Very close to X. sextuberculatum ; but the short carinate interstices at the base are 
wanting, and there are but two teeth on each side at the apex; these, however, are very 
acute and prominent. A single specimen was captured by Champion. 
DINODERUS. 
Dinoderus, Stephens, Ill. Brit. Ent. ui. p. 354 (1880). 
Dinoderus appears to be separated from /hizopertha on very slight and hardly suffi- 
cient grounds. It is also not very much differentiated from Xylopertha; but the tarsi 
are shorter. The first section, Dinoderus proper, contains about eight species, the 
type being a rare insect found in England. One species occurs in Madeira; and the 
rest are North-American. Rhizopertha, on the other hand, has a cosmopolitan species 
for its type (R. pusillus); and twenty-six species are catalogued from all parts of the 
world. 
1. Dinoderus punctatus. 
Apate punctatus, Say, Journ. Acad. Philad. v. p. 258. 
Dinoderus punctatus, Horn, Proc. Am. Phil. Soc. 1878, p. 550°. 
Hab. Norra America, United States, Pennsylvania !, Texas (Belfrage).— GUATEMALA, 
Mexico, Ciudad in Durango, 8100 feet (Forrer), San Gerénimo (Champion) ; Nicaragua 
(Sallé coll.). 
2. Dinoderus pusillus. 
Dinoderus pusillus, Fabr. Ent. Syst. Suppl. p. 156°. 
Rhizopertha pusilla, Steph. Ill. Brit. Ent. iii. p. 354°; Fairm. Rev. Zool. 1850, p. 50°; Jacq. 
Duval, Gen. Col. iii. t. 57. f. 281°; Kiesenw. Nat. der Ins. Deutschl. v. p. 41. 
Dinoderus pusillus, Horn, Proc. Am. Phil. Soc. 1878, p. 550°. 
Hab. Evrore2?4; “ America Ins.”1, United States®°—Mexico, Vera Cruz (Sallé 
coll.) ; Honpuras, Belize. 
Common in wood of sugar-casks &c., and, according to Dr. Horn, in wheat. It does 
not appear to have been met with in any numbers in Central America. The thorax 
has the tubercles arranged in somewhat concentric rings, uniting into undulating ruge 
in front. ‘The tibiz are setulose, and the elytra coarsely punctate-striate. 
BIOL. CENTR.-AMER., Coleopt., Vol. III. Pt. 2, Judy 1888. 2F 
