102 HETEROMERA. 
the humeri prominent; in the remaining species (which might perhaps be placed equally 
well in Zophobas) the base of the elytra is, as in Zophobas, without a raised margin, and. 
the humeri rounded and almost obsolete. Five species are now known from Lower 
California and Central America; two others have been described by Kraatz from South 
America *. | 
1. Rhinandrus elongatus. 
Rhinandrus elongatus, Horn, Proc. Acad. Phil. 1866, p. 400°. 
Ezerestus jansoni, F. Bates, Ent. Mo. Mag. vi. p. 269, t. 2. f. 1, la’. 
Proderops foraminosus, Fairm. Ann. Soc. Ent. Fr. 1878, p. 894+; Kraatz, Deutsch. ent. Zeit. 1880, 
pp. 182, 133. 
Hab. Mexico (coll. F. Bates), Yucatan 1; Nicaracua +, Chontales ? (Janson, Belt). 
The type described by Dr. Horn is before me ; it agrees perfectly with the Lxerestus 
jansoni, F. Bates. 
2. Rhinandrus foveolatus. (Tab. V. fig. 11, ¢.) 
Proderops foveolatus, Kraatz, Deutsch. ent. Zeit. 1880, p. 133°. 
Hab. Mexico! (Sommer), Tehuantepec (Sal/é). 
8. Rhinandrus helopioides. (Tab. V. fig. 12, ¢.) 
Ezerestus helopioides, Kraatz, Deutsch. ent. Zeit. 1880, p. 135°. 
Hab. Muxico, Oaxaca! (Sallé, Baulny). 
4. Rhinandrus obsoletus. (Tab. V. fig. 15, ¢.) 
Elongate, depressed above, dull black, subopaque, winged. Head small in the female, larger and longer in the 
male, shallowly, very finely, and sparingly punctured, the epistoma in the male broadly and rather 
deeply emarginate ; prothorax broader than long, narrowed anteriorly, moderately convex, narrowly 
margined, widest about the middle, the sides rounded and distinctly sinuate before the base, the hind angles 
distinct and subacute, the anterior angles deflexed and obtuse, the disc slightly raised transversely 
immediately before the base, the elevation defined anteriorly by a shallow transverse impression and limited 
on each side by an oblique fovea, exceedingly finely and shallowly punctured; elytra wider than the 
thorax at the base and more than three times as long, widest beyond the middle, the humeri rounded and 
almost obsolete, finely or obsoletely punctate-striate, scutellar stria obsolete, interstices flat, almost smooth ; 
posterior femora in the male broadly flattened and expanded, the upper face towards the base rugulose 
and concave within. 
Length 20-24 millim. (¢ 9.) 
Hab. Mexico, Presidio and Ventanas (Forrer). 
Var.? A little more convex and less depressed, the epistoma in the male more deeply emarginate, the elytra 
with an indistinct fine scutellar stria. 
Hab. Mexico, Alamos (Buchan-Hepburn). 
* Dr. Horn has quite recently (Trans. Am. Ent. Soc. xii. p. 160, April 1885) described yet another species 
from Arizona, R. sublevis; this is apparently very closely allied to &. obsoletus, but is described as having 
distinct humeri to the elytra. 
+ The locality given by Fairmaire is “Amérique méridionale,” but Kraatz in Ent. Zeit. (oc. cit.) gives 
“ Siid-Amerika ” for the same insect. . 
