560 Mr. T. Vernon Wollaston on the 



those on the latter are not only more approximate, but are 

 situated close behind the anterior margin. And there is 

 also another feature which distinguishes this genus from 

 every other with which I am acquainted, namely the 

 fact that its two hinder femora are fringed beneath, in the 

 middle, with a narrow edging of short fulvescent pile ; 

 whilst the tibiae (of the same pair of legs) are arcuated, 

 and furnished on their inner side, towards the base, with a 

 fascicle of elongated hairs. The legs are thicker than in 

 Catolethrus, and the spine at the internal angle of the 

 tibiae (especially the four posterior ones) is larger and more 

 robust. 



72. GLCEODEMA (nov. gen.). The two beautiful insects, 

 communicated by Mr. Pascoe, on which the present genus 

 is founded (and which were captured by Mr. Wallace at 

 Dorey and Saylee in New Guinea), are so remarkably alike 

 in colour, outline, and sculpture that I cannot feel alto- 

 gether certain that the very peculiar discrepancy which 

 they display in the construction of their rostrum may not 

 be merely sexual ; and if this should prove to be the case, 

 it follows that they must be treated eventually as members 

 of a single species. With but a solitary example however 

 of each of them to judge from, I feel scarcely warranted in 

 assuming that a character so important and conspicuous 

 is indicative only of the sex ; and I have therefore regarded 

 them as specifically distinct. The feature to which I 

 allude is the shape and length of the rostrum, which in 

 one of the individuals now before me (and, I may add, 

 very much the larger one of the two) is gradually widened 

 towards the tip to a most marvellous extent, whilst in the 

 other it is but slightly increased in breadth. 



In other respects Glceodema is remarkable for the large 

 size, fusiform outline, and somewhat convex, highly- 

 polished, almost unsculptured surface of the insects of 

 which it is composed, which moreover are anomalously 

 variegated with red and black (a very unusual combina- 

 tion amongst the Cossonidce). Their head is elongate, 

 and greatly exserted ; their eyes are rounded, rather promi- 

 nent, and wide apart ; their prothorax is convex, and per- 

 fectly even (being quite free both from depressions and 

 keel) ; and their limbs are long, but much incrassated, 

 the second funiculus-joint being remarkably shortened, 

 the club narrow and acuminated, the four hinder tibiae (as 

 in Phacegaster, Exonotus, and others of the immediately- 



