( 303 ) 



I must separate this species from A. boisduvali and allied species on account of 

 colour of the antennae, legs and elytra, and the much less deeply suloate thorax, the 

 sulcus of which is broadly interrupted at the middle; the elytra have a distinct 

 basal depression, and are of a less intense black and less shining than is the case in 

 A. boisduvali ; they also have a slight dark bluish tint, and their punctuation is onlv 

 visible with a strong lens. 



Aulacophora apicalis Jac. 

 Specimens obtained at Humboldt Bay and Adonara, which I refer to this 

 species differ in being much smaller (2 to 2J lines), in having the disc and base of the 

 thorax sparingly punctiu-ed and the antennae either fulvous or black ; the latter organs 

 extend to the end of the elytra ; the male inspect has the anal segment of the abdomen 

 trilobate, the intermediate lobe being deeply sulcate; in the large prominent eyes, 

 the naiTow elytral epipleurae and other particulars, the specimens agree with the 

 type. 



Aulacophora militaris sp. no\. 



Fulvous, the labrum black, thorax impunctate, elytra without basal depression, 

 minutely punctured, black, a trans\erse band across the middle and the extreme 

 apex, fulvous. 



Aberr. The labrum flavous, the antennae more or less fuscous. 



(J. The trilobate apical segment of the abdomen with its middle lobe deeply 

 longitudiually sulcate. 



Length 2 to 2i lines. 



Hab. Humboldt Bay (New Guinea). 



Closely allied in coloration to A. fraudulenta Jac, insularis Jac, instabilis 

 Baly, rubrozonafa Blanch., and albofasciata Baly, but to be separated from eitlier 

 by being only half the size, from A. fraudulenta in haWng simple not dilated 

 antennae, and from the others in the male sexual character; the fulvous band of the 

 elytra is of a reddish tint, narrow, with its anterior margin very nearly straight (in 

 one specimen it is concave-emarginate near the suture), and the posterior one dentate 

 at the middle, only the extreme apex of the elj'tra are fulvous to a greater or smaller 

 extent; I cannot find any other differences in the aben-ation except the fulvous not 

 black labrum. All these closely allied forms are however so variable and their 

 separation is so difficult that great numliers of specimens are required to understand 

 the value of this variation in regard to specific distinction. 



Aulacophora nig^roplag-iata sp. nov. 



Fulvous, thorax impunctate, elytra closely and finely punctured, without basal 

 depression, a transverse band at the base and a rounded spot near the ajiex, black. 



<?. The third joint of the antennae slightly widened, longer than , the fourth, 

 apical segment of the abdomen trilobate, the median lolie longer than broad, very 

 slightly concave. 



Length 2 J lines. 



Head flavous, impunctate, frontal ele\ations l)road, transverse, not very strongly 

 raised, labrum and ])al))i fulvous, antennae fulvous (the apical joints .sometimes obscure 

 fuscous), thiril joint longer than tlie fourtli, thorax more than twice as broad as long, 

 the anterior angles deflexed, rather obsolete, the transverse sidcus straight, moderately 



