C. J. GAHAN— COLEOPTEEA. 210 



DiACANTiiA PASSETi AUard, var. 



= Prosmidia suturalis Jac. Ann. Soc. Ent. Fr. 1908, p. 521. 



Ruwenzori, 5300-SOOO ft. [G. F. Scott Elliot). This variety, distinguished by the 

 reduction of the black coloration of the elytra to a narrow sutural and a narrow 

 marginal band, was obtained also by M. Maurice Rothschild at Malo, in British East 

 Africa, and by Mr. C. S. Betton at Lagari. The examples from Lagari include colour- 

 forms intermediate between suturalis and pygidinlis. 



DiACANTHA VICINA, sp. n. 



S . Head (a transverse testaceous spot on the vertex excepted), prothorax, scutellum, 

 body beneath, and legs black ; antennae brownish-black, with the first three joints 

 testaceous yellow ; elytra purplish, with an elevated basal area on each yellowish. 

 Pronotum with a transverse iinpression on each side near the middle, and with a 

 narrow transverse elevation a little in front of the basal margin ; this elevation has a 

 rather sharp posterior edge, and at the middle is continued backwards to the base, its 

 entire edge being somewhat of this shape : l^j. Scutellum slightly concave, glossy, 

 in the form of an equilateral triangle. Elytra distinctly and very closely punctate, 

 except on the basal prominence ; this is almost impunctate and bears only a single 

 tubercle. The first abdominal segment has a rounded piligerous pit in the middle, 

 and the last segment a concave depression along the middle. 



Length 8^ ; breadth 4 mm. 



Hab. Mubuku Valley, E. Euwenzori, 6000-7000 ft. One example. 



This species resembles I), didincta Gahan in the puncturation of the elytra. In 

 the single specimen taken the elytra, except at the base, are of a reddish-purple tint, 

 but I believe that this colour is a sign of immaturity, and that the normal colour will 

 prove to be the same as in D. distincta, viz. metallic blue. From J), distincta Gahan 

 and D. amoena Weise (the latter appears to me to be only a slight colour-variety of the 

 former) it difi'ers in the black colour of the prothorax and scutellum, in the form of 

 the basal elevation cm the pronotum, the larger size of the scutellum, and in having 

 only a single tubercle at the base of each elytron. In D. distincta there is, in 

 addition to the anterior tubercle at the summit of the basal prominence, anoiher small 

 tubercle placed almost on the suture just behind the scutellum. 



DiACANTHA NiGRONOTATA, sp. n. (Plate VII. figs. 3 & 4, var.) 



Head, prothorax, and elytra reddish-yellow, the latter with one or two small round 

 black spots on each before the middle, and having also the apical margin, together 

 with the sutural and lateral margins in their posterior half, black ; antennae black, 

 with the first two or three joints fulvous; body beneath and legs black; abdomen 

 yellowish at the margins and over the whole of the dorsal side. Antennas rather 



