206 MR. C. O. WATERHOUSE ON [Feb. 15, 



female, and gently emarginate in the male. The head and thorax 

 are sometimes yellow, sometimes black. The elytra are yellow or 

 red, uniform or marked with black ; with one or two spots at the 

 base of each elytron, one a little before the middle (which frequently 

 extends into a fascia), a spot rather behind the middle (which some- 

 times extends into a fascia or occupies the whole apical region). 



Length 5|-fi lines. 



I have not been able to find where Mr. Baly described this 

 species. 



25. Arescus PULCHER, u. sp. (Plate XXX. figs. 11, 12.) 



This species most nearly approaches A. lahiatus, but differs in 

 having the antennae almost entirely black. The interantennal 

 process of the forehead is broader and more obtuse. The elytra 

 are yellow with deep violet or bluish spots and bands, instead of 

 having the marking nearly black as in A. labiatas ; and there are 

 oidy two spots at the base of each elytron instead of three; the 

 dorsal spot being more removed from the suture, is more in the 

 middle of the base ; and the humeral spot is more above the shoulder 

 than at the side of the humeral callosity as in A. labiatas. 



Length 7 lines. 



Var. 1. Elytra yellow with two spots at the base. 



Var. 2. Elytra with two spots at the base, with a broad fascia be- 

 fore and another behind the middle. 



Var. 3. Like variety 2, but with the two basal spots confluent. 



Var. 4. Head, sides of thorax, and legs reddish yellow ; elytra 

 ■with two spots at the base, a broad fascia before the middle, and a 

 large oval spot in the apical area. 



26. Arescus ^multjs, n. sp. (Plate XXX. fig. 13.) 



A., pallide flavus ; thorace antice sat angustato, ad latera sat ptin- 

 ctato, elytris ploga magna cyanea. 



Long. 5| lin. 



Most nearly allied to A. perplexus, Baly, but differs in having the 

 thorax much narrower, and distinctly narrowed anteriorly, less convex, 

 and with the posterior angles more divergent ; at the sides and the 

 region of the posterior angles there are some rather strong punctures. 

 The coloration would probably vary, as in the other species ; but in 

 the specimen which I am describing, the antennae (except at the 

 base beneath), the scutellum, the edge of the tibiae, and the tarsi 

 are black. The elytra are very pale yellow, with a large patch of 

 dark blue behind the middle ; but this patch is not of quite (he 

 same shape on the two elytra. 



27. Arescus histrio, Baly, Cat. Brit. Mus. p. 82, pi. vi. f. 8. 



Mr. Buckley found this species in great abundance. It is the 

 most variable Coleopterous insect at present known, and has this re- 

 markable peculiarity, that the elytra have sometimes a longitudinal 

 stripe and in some varieties transverse bands. 



