244 RKHYNCHOPHORA. 
interstices almost flat, the minute piligerous punctures somewhat conspicuous. First ventral segment, 
hollowed down the middle, the fifth slightly tumid in the centre posteriorly. 
Length 73-84, breadth 23-31 millim. 
Hab. Mexico, Acapulco (H. H. Smith). 
Two males, found in September, one showing the commencement of the change of 
colour in the scales—from whitish to green. Closely related to M. albicans, but 
with the scape of the antenne slender at the base (and therefore strongly clavate), 
the elytra considerably wider than the prothorax and with a series of short, fine, 
decumbent hairs down each interstice. The slender base of the antenne also separates 
M. brevipilis from M. fusiformis and the cinereo-squamose variety of M. splendidus. 
5. Megalostylus albicans. (Tab. X. figg. 27, ¢ ; 28, o, var.; 29, 2, var. 
expansus.) 
9. Apotomoderes albicans, Lacord. Gen. Col., Atlas, p. 21, t. 62. figg. 5, 5a, 6°. 
2. Apotomoderus albicans, Chevr. Bull. Soc. Ent. Fr. 1878, p. liv’. 
3. Megalostylus farinosus, Chevr. loc. cit. p. xvi’. 
?. Megalostylus expansus, Pasc. Ann. & Mag. Nat. Hist. (5) vii. p. 42 (1881) *. 
3. First ventral segment depressed down the middle and the fifth somewhat tumid in the centre 
posteriorly. 
Q. Prothorax with the hind angles usually a little more prominent than in ¢, sometimes extending 
outwards to beyond the elytra (M. evpansus, Pasc.); fifth ventral segment tumid along the median 
line. 
Var. The scales above and beneath green or golden-green. 
Length 6-13, breadth of elytra 2-5 millim. (¢ @.) 
Hab. Mexico ®* (Truqui, in Mus. Brit.), Puebla, Guanajuato (Sadlé), Cuernavaca, 
Chilpancingo, Irapuato, Matamoros Izucar (fHége), Amula, Xucumanatlan (H. J. 
Smith). 
The typical form of this species, sent us in abundance from Cuernavaca, is uniformly 
cinereous or whitish, the variety with the scales green (not previously recorded) being 
apparently much scarcer. Both forms have been received from Chilpancingo and 
Amula. The prothorax is as wide at the base as the elytra in both sexes. The 
rostrum is broadly excavate from the tip to near the eyes. The longitudinal plica 
on the fifth ventral segment of the female is conspicuous. About sixty specimens 
have been examined, the females showing considerable variation in the lateral 
development of the hind angles of the prothorax. Lacordaire! gave no locality for 
his A. albicans, and that given for it by Chevrolat 2—California—must be due to some 
mistake in labelling. 
6. Megalostylus splendidus. (Tab. X. figg. 30, 2 ; 31, var. 3.) 
Megalostylus splendidus, Chevr. Bull. Soc. Ent. Fr. 1878, p. lv *. 
Var, The scales above and beneath cinereous (in one specimen cupreo-cincreous), sometimes with brownish 
