1. Banchus Flavescens.— ♂ . Pale yellow ; a bilobed mark behind antennæ, extending between them downward upon middle of face, band across vertex from eye to eye, covering ocelli, posterior margin of occiput, maxillary palpi, two apical joints of labial palpi, antennæ above, stripe on middle of mesothorax. dilated anteriorly, a stripe on each side over the wings, basal suture of scutellum, base of metathorax, broader laterally, spot on each side of pleura posteriorly, posterior coxæ within, their femora beneath, apex of their tibiæ and a broad band at base of four basal segments of abdomen, black; antennæ longer than body, slender at tips ; scutellum with an acute dusky spine ; wings hyaline, faintly yellowish, nervures brown, stigma and costa pale honey-yellow; posterior coxæ and femora stained with ferruginous; abdomen shining, short, apex broad, truncate and compressed. Length five lines.

On September 10, 1868, during one of our regular Monday morning excursions, I captured on a beech tree, a short distance from London, a larva which I judged to belong to the Smerinthian. genus. Its chief peculiarity, to which I wish to call attention, was its power of emitting a singing noise when handled or disturbed. The noise was similar to that produced by that pretty little beetle so common in our gardens, Lema trilineata. This is the only instance of a musical larva that I have met with, nor do I remember to have ever seen any mention in entomological books of a similar case. I should be glad to know, Mr. Editor, if you, or any of your correspondents, have ever noticed this musical power in any larva? or if you can explain the manner in which the noise is produced.