474 Mr. C. J. Gahan on the 



simples dans les deux sexes, avec un leger feston, souvent 

 absent, a leur base. M. Pascoe cite cependant certaines 

 esp^ces {amboim'ca, cyanipennis) chez les males desquelles 

 ce feston se convertit en une dent aigue." Here two con- 

 ditions of the tarsal claws are indicated — first, in which the 

 claws are simple in both sexes ; second, in which the claws 

 of the female are simple, while those of the male are toothed 

 or appendiculate at the base. Each of these two conditions 

 is met with in a large number of species; but I find that a 

 different structure of the claws prevails in almost as great a 

 number. 



In G. pulchella^ Thorns., the anterior claw of the anterior 

 and middle tarsi of the male is furnished at the base, a little 

 towards the outer side, with a distinct tooth, all the other 

 claws being simple. This condition, which is similar to that 

 met with in many species of Saperda, occurs also in many 

 other species of Glenea — e. g., nicanor, Pasc, Diana, Th., 

 volupfuosa, Th., Thomsom, Pasc, and giraffa, Dalm. In 

 another series of species the anterior claw of the middle 

 tarsi only is provided with a tooth at the base; this is the 

 condition met with in nearly all the large species of the 

 picta group, and in a number of smaller species, such as 

 egeria, Pasc, and distinguenda, Gahan. This tooth is 

 strongly developed in some species ; and in G. chalyheata, 

 Th., and regularis, Newm., it is of so large a size that the 

 anterior tarsus of the male appears to be furnished with three 

 claws instead of two. Another condition of the claws 

 appears in a few species, in which the anterior claw of the 

 anterior tarsi only is furnished with a distinct tooth at the 

 base; this condition is best shown in G. galathea, Th., where 

 the tooth is so strongly developed that the tarsus appears 

 to have three claws. G. galathea, it may be remarked, 

 seems in other respects closely allied to G. indiana, Th., and 

 canidi'a, Th., in both of which species all the claws of the 

 male are simple. 



A further condition of the claws is met with in G. novem- 

 guitata, Casteln., alboh'neata, Th., coiruleata, Pasc, lugubris, 

 Th., and other species. Here the anterior claw of all the 

 tarsi in the male is furnished with a tooth or appendix at the 

 base, while the posterior claw is either simple or carries a 

 smaller and less conspicuous tooth than the anterior claw. 



So far as I have at present observed, the females of Glenea, 

 except in four species hitherto placed in the genus, always 

 possess simple claws. In two of those four species — viz., 

 G. tenuih'neata, Th., and G. camelina, Pasc. — all the claws 

 in the female are appendiculate at the base. The remaining 



