HETEROMERA. 489 
Chalchicomula, Amecameca, and Acapulco (Hége), and Mochitlan in Guerrero (Baron), 
and I am now convinced that Z. venosus should be separated from Z. levicollis. 
Zopherus tuberculatus (p. 41). 
We have received an additional specimen of this species, from Santo Domingo, 
Tehuantepec (Richardson). 
7. Zopherus mexicanus. 
Zopherus mexicanus, Gray, in Griffith’s Animal Kingdom, Append. p. 796, t. 50. fig. 5 (nec 
Solier). | 
Zopherus maculatus, huj. op. p. 41. 
To the locality Mexico, add :—Zacualtipan in Hidalgo, Mexico city (Hége), State 
of Jalisco (Richardson). 
The Zacualtipan specimen (like those described by me under the name maculatus) 
agrees well with the type of Z mexicanus, Gray; the one from Jalisco has the tubercles 
on the elytra much more numerous. The apical tubercles are small, and the suture 
is a little swollen at the apex, so that, at first sight, the elytra appear to be quadri- 
tuberculate at the tip. The ventral tubercle is not trilobed in front, as in the closely 
allied 7. venosus. 
7 (a). Zopherus elegans. (Tab. XXII. fig. 7.) 
Zopherus elegans, Horn, Rev. Ten. of Am. north of Mexico, pp. 271, 272 (1870) *. 
Hab. Norta America, Eastern New Mexico !.—Maxico, Villa Lerdo and Refugio in 
Durango (Hége). 
“ Similar in form to Z. tristis or Z. concolor, but rather more slender; black, subopaque; thorax longer than 
broad, broader in front, sides moderately rounded and gradually narrowing to base, surface moderately 
convex, with sparsely placed distinctly muricate punctures, each bearing a scale-like hair, margins with a 
narrow white space, in which are included moderately elevated, smooth round black tubercles; elytra 
elongate-oval, narrower than the thorax, moderately convex, and with nine rows of tubercles, more con- 
fused and less distinct at the suture, and becoming more rounded, distinct, and distant towards the 
sides, where there is a narrow band of white containing three of the rows of tubercles ; body beneath 
black and opaque, very sparsely punctured, each puncture with a scale. Length *60 inch.” 
Numerous examples from Durango agree well with this description, which was 
taken from a single specimen captured by Dr. Palmer. ‘The elytral sculpture is, as 
usual, variable, and the tubercles are sometimes entirely obliterated towards the suture ; 
the thorax also varies in this respect, and the tubercles along the lateral margins are 
often obsolete. 
Zopherus nodulosus (p. 42). (Tab. XXII. fig. 6, var.) 
A beautiful variety of this species obtained by Mr. Richardson at Santo Domingo, 
Tehuantepec, has only about six moderately large, irregular tubercles on each elytron 
