LONGICORNIA. 229 
The eyes in the male above approach usually to within three fourths of a millim., 
in the female to 14 millim.; but in one of Mr. Belt’s male examples from Chontales 
they approach much more closely, viz. one third of a millim. 
1(a). Derobrachus sulcicornis, (Tab. XVI. figg. 53, 6 2.) 
Derobrachus sulcicornis, Leconte, Journ. Ac. Phil. ser. 2, vol. ii. p. 110, note (1852)'. 
Hab. Mexico, Puente Nacional }, Orizaba (Sallé), Villa Alta! (Sturm coll.). 
Differs from D. longicornis in the sides of the elytra being widely dilated from 
behind the shoulders to the middle, their surface being more distinctly, but still 
vaguely, furrowed and obtusely costate, and in the thorax being faintly rugulose 
punctured, nearly smooth on the disc, and apparently not pubescent. The antenne 
are similarly sculptured, the sulcus of the third joint extending about two thirds its 
length ; but they are decidedly shorter, not quite reaching the tips of the elytra. 
A female example has rather smoother and more polished elytra than the male. 
The third antennal joint sulcated, in which it differs from D. longicornis (female). 
Leconte’s description, “ Nigro-piceus, thorace ineequaliter varioloso-punctato .. . elytris 
... basi punctatis humeris fere scabris,” applies rather better to D. inequalis, Bates, 
than to the present species. A specimen, however, in the Sallé collection is named 
D. sulcicollis, and there is no reason to doubt the correctness of M. Sallé’s deter- 
mination. 
Derobrachus inzequalis (p. 4). 
To the locality given, add :—Mexico, Yucatan (Boucard), Cordova (Sallé), Misantla 
(Hoge), Cerro Gordo (Flohr), Tehuantepec (Sumichrast). 
The original description of this species given in Trans. Ent. Soc. 1872 (not 1869, as 
quoted by error, supra p. 4), p. 167, was drawn up from what is now evident is a rare 
aberration: a single male of brownish coloration, with the middle thoracic spine aborted. 
In the large series received the colour is constantly sooty black, scarcely shining ; and 
the thorax, short and broad as in D. sulcicornis, has on each side three very long and 
sharp spines equally as in that species, the apical one of which is, in a minority of 
individuals, subbifid. The thorax is much more coarsely punctured, and the elytra 
more strongly furrowed and costate and more distinctly punctured near the base than 
in D. sulcicornis. One female only has been received by Messrs. Godman and Salvin. 
9. Fuligineo-nigra, subopaca, thorace partim grossissime scabroso-punctato, elytris basi granulatim punctulatis, 
humeris grossius punctatis; antennarum articulo 3° acute sulcato. 
Long. 27 in. 
One example in the Sallé collection labelled “ Derobrachus nietot, Sallé.” 
