172 Mr. J. O. Westwood's Description 



duobus latioribus lateralibus, lobo utrinque postico magis 

 elevato ; elytris planis, sutura costisque tribus in singulo 

 elevatis, lateral! majori et acuta, corpore infra piceo. 



Long. Corp. lin. 4 ; lat. fere lin. \\. 



Habitat in Brasilia, prope fluvium Amazon. Dom. H. W, Bates. 



In Mus. Hopeiano, Oxonise, et alior. 



P.S. — A description and figure, including the structural details 

 given above and represented in the accompanying plate (Plate I. 

 fig. 14 — 22^, were communicated to the Entomological Society on 

 the 1st February, 1858, and a short notice of the communication 

 (sufficiently characteristic however for identification) was pub- 

 lished in the Journal of the Proceedings of the Society given in 

 the Zoologist of the following month. Specimens of the insect, 

 however, having been forwarded to Paris, a fresh description and 

 figure of it were published some months subsequently* by Mr. 

 Thomson in his " Archives Entomologiques," under the name of 

 Anlacinia Rhysodioides. The description is accurate, and the 

 figures, both of the perfect insect and details, are generally ex- 

 cellent: the costae on the elytra are, however, too much curved in 

 the figure of the perfect insect, and the pronotum too strongly 

 tubercled. The true character of the legs is also not carefully 

 rendered. The figure representing the underside of the head 

 enormously magnified is unintelligible as regards the under parts 

 of the skull. I find, in fact, nothing of the ornamental details 

 represented within the hind part of the antennary canals, neither 

 is there any truth in the two biarticulated processes represented 

 on the outside of the mentum. The anterior lateral lobes of the 

 piece supporting the mentum extend forwards as far as the 

 insertion of the antennae, and the apparent second joint in M. Ni- 

 colet's figure is in fact nothing else than the deflexed edge of the 

 mandibles : all that is required, therefore, is to scratch out the 

 transverse line at the extremity of this supposed second joint, 

 whereby it will appear what it really is, the interior edge of the 

 mandibles. 



* Mr. Thomson's description forms portion of a paper to which the date of 1st 

 February, 1858, is prefixed. This must, however, have been the date when the 

 article was written, since we find in a preceding page of the same sheet a note of 

 a letter, dated from Bahia, on the 11th March. 



