OTOCERUS.—PSEUDOTOCERUS. 383 
Six examples. In general facies this insect departs widely from the described species 
of Otocerus; I am unable, however, to satisfactorily separate it from that genus. The 
unicolorous violaceous surface, serrate antennz, widely separated eyes, broadly rounded 
anterior angles of the thorax, and transversely creased elytra readily distinguish 
O. impressipennis from its allies. The thorax is still more distinctly margined at the 
sides than in O. nicaraguensis: in this respect O. impressipennis differs from the more 
typical species much in the same way as does Pecilesthus from Strongylium. 
PSEUDOTOCERUS. 
Near Otocerus and differing as follows :—Head longer and more exserted; eyes small, more or less widely 
separated, and distant from the prothorax; last joint of the maxillary palpi less strongly securiform ; 
antenne long and rather slender, a little flattened from the fourth joint, the third joint about one half or 
less than one half the length of the fourth, the joints 4-10 subparallel and scarcely dilated at their inner 
apical angle; prothorax cylindrical, immarginate at the sides, almost unimpressed ; elytra more or less 
attenuate behind ; legs very slender, the intermediate and posterior pairs exceedingly long and slender ; 
the first joint of the posterior tarsi very long, in P. longipes three times, in P. attenuatus twice, as 
long as the apical joint; prosternum longitudinally and angularly raised on each side (very sharply so in 
P. longipes) between the coxe ; form elongate, cylindrical. 
This new genus is proposed for the Brazilian Stenochia longipes, Lucas, and an 
undescribed form from Nicaragua. Maklin places the former somewhat doubtfully in 
Otocerus, and at the end of that genus, and at the same time calls attention to the 
peculiar form of the prosternum, &c. ; a second species having now been discovered the 
differences are such as to warrant their separation. 
1. Pseudotocerus attenuatus, (Tab. XVI. fig. 25, 2.) 
Subcylindrical, narrow, cyaneous, with a violaceous tinge, moderately shining. Head very closely and some- 
what coarsely punctured behind, irregularly so between the rather widely separated eyes, more finely 
punctured in front, the antennary orbits very prominent; antenne with the third joint very short, not 
half the length of the fourth, the joints from the fourth long and rather broadly flattened almost from 
the base and very little dilated at the inner apical angle, 5-7 shorter than 4, subequal (the rest missing), 
violaceous ; prothorax cylindrical, nearly as long as broad, gradually narrowing from the base (a little 
more rapidly so near the apex), the base and apex nearly straight, the latter very strongly margined, the 
anterior angles obtuse, the hind angles subacute, the basal fovese very shallow, the disc obsoletely canali- 
culate, the surface closely and somewhat coarsely punctured, the punctures here and there confluent ; 
scutellum subtriangular, violaceous ; elytra long and attenuate, subparallel in their basal half, the apices 
almost pointed, rather coarsely punctate-striate, the punctures oblong in shape and coarser towards the 
base, and finer and shallower towards the apex, the interstices flat to beyond the middle, slightly convex 
behind, and closely and finely punctured; beneath rather more shining, violaceous, the ventral surface 
very finely and sparingly punctured, the fourth and fifth ventral segments more coarsely so, the sides 
and side-pieces of the metasternum and the flanks of the prothorax closely and coarsely punctured ; 
legs coarsely and somewhat closely punctured, violaceous, the tibie towards the base and the tarsi 
reddish. 
Length 11 millim.; breadth 23 millim. (¢ -) 
Hab. Nicaracua, Chontales (Belt). 
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