PACHYBRACHYS. 149 
other characters of separation. P. bifasciatus might perhaps have been placed equally 
well in Scolochrus, with some of the small species of which it quite agrees in shape and 
sculpture. The variety differs from the type in having the elytra black with five or six 
fulvous spots (the remnants of the light-coloured raised spaces of the type); of these 
the middle ones are placed obliquely and transversely across the centre and a larger 
one at the apical angle of each elytron. 
Pachybrachys laticollis (p. 72). 
To the Mexican localities given, add:—Chilpancingo (Hége), Amula in Guerrero 
(H. H. Smith). : 
P. laticollis is apparently a rather doubtful species. The description was taken from 
a male specimen from San Gerdnimo, this having the terminal joint of the antenne 
distinctly elongate and widened ; and other examples of the same sex, obtained subse- 
quently at Chilpancingo, also possess this character, which seems to be a constant one. 
The thorax, which is proportionately wide and rather strongly rounded at the sides at 
the middle (forming a continuous outline with the sides of the elytra), is extremely 
closely punctured, and is either black with the margins narrowly and an irregular 
number of small spots flavous, or brown with similar pale spots and three darker longi- 
tudinal bands ; the elytra are flavous, mottled with dark brown, irregularly and closely 
punctured near the suture, and longitudinally costate at the sides and apex. ‘The 
temale has simple antenne. Specimens from Vera Cruz are entirely obscure dark 
brown above ; but being all females I am not able to say whether they belong to this 
or to an allied species. P. laticollis can therefore at present only be distinguished 
from its allies by the structure of the antenne in the male sex, and the broad and 
extremely closely punctured thorax; the pygidium has four yellow spots. 
23 (a). Pachybrachys femoratus ? 
Cryptocephalus femoratus, Oliv. Ent. vi. p. 810, t. 5. fig. 78°. 
Pachybrachys femoratus, Suffr. in Linn. Entom. vii. p. 173’. 
- Cryptocephalus sparsus, Newm. Entomol. 1841, p. 79°. 
Pachybrachys sparsus, Haldem. Journ, Ac. Phil. 2 ser. i. p. 261+. 
Hab. Norta America! ??%4,—Mexico, Acapulco in Guerrero (Hége); GuatTema.a, 
near the city, Duefas, Capetillo, San Gerénimo (Champion), Petapa, Llano grande 
(mus. Stuttgart); Nicaragua, Chinandega, Granada (Sallé); Panama, Volcan de 
-Chiriqui, Boquete, Caldera, David, San Lorenzo, Tolé, Pefia Blanca (Champion). 
It is impossible to refer the numerous specimens from the above localities with 
certainty to the present or to either of the numerous similar closely-allied species 
described by Suffrian without comparing the types. This author’s description of 
P. femoratus seems, however, to agree best with the insects before me; they almost 
