118 Mr. ¥. P. Pascoe on some new or little-known 



pubescent, nearly as long as the head and prothorax together ; wings 

 deep steel-blue, shining; abdomen black, slightly tinged with blue, 

 with a very remote greyish pubescence ; legs black, anterior eoxse and 

 femora testaceous, the intermediate darker. Length 11 lines. 



Dioptoma [Lampyridaej. 



Head exposed. Eyes very large, horizontally constricted, the upper 

 portion smallest, the lower much larger, and completely contiguous. 

 Antennas short, claviform, subapproximate, deeply set on each side of 

 the narrow prolongation of the front, twelve-jointed, the first two in- 

 crassated, the remainder forming an elongated club. Mandibles very 

 slender, curved, not toothed. Palpi robust. Prothorax transverse, 

 semicircular, not dilated at the sides. Scutellum rather large, tri- 

 angular. Elytra as broad as the prothorax at the base, gradually rounded 

 at the sides, narrow and flattened posteriorly. Winged. Legs mode- 

 rate ; intermediate coxae not approximate ; tarsi slender, the fourth 

 joint not bilobed. 



Although I do not hesitate to refer this most extraordinary insect 

 to the Lanipyridae, yet it must be confessed that it is a very aberrant 

 form, and suggests no affinity with any Malacoderm genus that I am 

 acquainted with. Its head (composed, at least externally, almost 

 entirely of eyes, which are constricted in the middle like an hour- 

 glass) is fully exposed; the narrow vertex descends behind the 

 upper portion of the eye, and fills in the space behind and between 

 the constriction, and is prolonged in front to terminate in the labrum, 

 although, from the presence of numerous coarse hairs, the existence 

 of this organ cannot be positively asserted. The antennas are very- 

 short, scarcely extending to the prothorax, and show no traces of 

 being serrated. I am indebted for the only specimen I have seen 

 to Dr. Ernest Adams, of University College, after whom I have 

 named it. The abdomen of the specimen having been cut away, 

 apparently to facilitate (?) the mounting, the number of its segments 

 cannot be ascertained : the abdomen itself, however, appears to havo 

 been very small ; the metastemum must have exceeded it in length 

 as well as in breadth. 



Dioptoma Adamsii. (PI. V. fig. 2.) 



D. fusca, parce pilosa; scutello elytrisque pallide grisescentibus, his 

 plaga elongata fusca humerali. 



Hab. India (Dacca). 



Dark brown, rather sparingly clothed with pale semi-erect hairs, 

 especially on the prothorax ; head coarsely punctured, mandibles red- 

 dish-brown, antennae and palpi pale yellowish ; prothorax thickly and 



