Bibliographical Notice. 373 
1. Isomerida albicollis, Castelnau. 
Hemilophus albicollis, Laporte de Castelnau, Animaux articulés, 11. p. 488. 
I. elongata, linearis, postice paulo angustata, tenuiter setosa ; capite 
thoraceque rufo-testaceis, cano interdum dense tomentosis ; elytris 
punctatis, interstitiis duobus elevatis, apice truncatis, rufo-testa- 
ceis plus minusve fuliginosis, vel totis nigris; abdomine nigro, 
segmentis tertio et quarto dense cano tomentosis ; antennis nigris, 
articulis basi testaceis. Long. 43-53 lin. ¢ 2. 
This common species is very variable in its coloration, and there 
is only a small proportion of examples which exhibit the white 
hue of the thorax, and these only in the dried state ; in life, the 
thorax is always red. The truncature of the elytra is straight 
and offers a short tooth at the exterior angles. 
It is found on the leaves of trees, and is a common and gene- 
rally distributed insect throughout the Amazonian forests. 
2. Isomerida ruficornis, n. sp. 
I. robustior, elongata, linearis, postice haud angustata, tenuiter setosa, 
nigra; capite, thorace, antennis (apice exceptis) et pedibus (femo- 
ribus supra exceptis) rufis ; elytris apice truncatis, angulis externis 
dentatis ; abdomine segmentis tertio et quarto dense cano tomen- 
tosis. Long. 6 lin. ¢. 
Head entirely red, depressed between the eyes. Antenne 
stout, as long as the body, finely fringed beneath; third joint 
one-third longer than the fourth, the following becoming very 
gradually shorter ; red, with the three apical joints tinged im 
the middle with dusky. Thorax thinly clothed with pale silky 
tomentum, visible only in certain lights ; red, prosternum and cir- 
cuit of the acetabula blackish. Scutellum black. Elytra slightly 
dilated a little before the apex, the latter straightly truncated, 
with the outer angles slightly produced; surface punctured) and 
marked with one faintly raised line besides the lateral carina ; 
deep black, shining. Breast and abdomen black; third and 
fourth ventral segments densely clothed with pale silky tomen- 
tum. Legs red, upper side of femora black. 
Fonte Boa, Upper Amazons. 
(To be continued. ] 
BIBLIOGRAPHICAL NOTICE. 
Our Reptiles: a plain and easy Account of the Lizards, Snakes, 
Newts, Toads, Frogs, and Tortoises indigenous to Great Britain. 
By M. C. Cooke. 12mo. London: Hardwicke, 1865. 
A.trHovuGcH the number of our British reptiles, even if we include 
the Batrachia among them, is very small, there is perhaps no other 
class of animals so generally misunderstood by the public at large. 
