Limgicornia Malayana. 107 



an amount of variation that its characters, if it were the type of 

 a genus, ought to be particularly strong. Confining Cacia to 

 those species which have a narrow mesosternum* toothed ante- 

 riorly, and the third and fourth joints of the antennae not thicker 

 than is usual, but the former much longer than any other joint, 

 there are still considerable modifications in the genus which it is 

 possible may lead to further division. Cacia setulosa, Pasc, from 

 Java, but not in this collection, furnished with numerous erect 

 hairs over the upper surface, is one of the most aberrant. Another 

 species, Cacia compta (^post, p. 112), has a tuft to the third as well 

 as the fourth joint of the antennae, but this is so far untrustworthy 

 that the tuft is sometimes absent from individuals of those species 

 which appear to have it normally. The type of the genus, Cacia 

 spinigera, Newm., has a little spine, or rather tooth, on the apex 

 of the third antennal joint, but this Mr. Newman very properly 

 considers as of specific value only, his second species, C. aspersa, 

 being without it. Mr. White has described a species from China, 

 which he has named Cacia laiifasciata, but which strictly cannot 

 be considered to belong to this genus. The species appear to be 

 subject to very considerable variation ; in nearly all the fifth 

 joint of the antennae is wholly or partially white. 



* A Cacia-^ovm, not belonging to the Wallacean Collection, which is ex- 

 cluded by having a broad flattish mesosternum, may be shortly characterized 

 here. The specimen is a female. 



Therippia. 



Characteres ut in fceminis Cacies, sed antenna corpore breviores, scapo 

 et articulis tertio quartoque fere sequalibus ; mesostenium latum, subpla- 

 natum, antice horizontaliter productum. 



Therippia decorata. 



T. nigra, nitida, glabra, pube albescente variegata ; elytris trifascialis. 



Hab. — Ceylon. 



Glabrous, black, and shining, with small intricate pubescent patches of 

 white, tinged here and there with rose; these occur irregularly on the head 

 and prothorax, but are collected into three bands on the elytra — viz., at the 

 base, middle and apex ; the femora are spotted, the tibiae have a white ring 

 in the middle ; the tarsi are black, with the two basal joints white ; the body 

 beneath is black and shining, with a very thin greyish pubescence; the 

 antennae have the second joint and bases of the remainder white, with a small 

 black tuft on the fourth ; the last six joints are together not more than half as 

 long again as the fourth. 



Length 6 lines. 



