1888.] INSECTS OF CHRISTMAS ISLAND, 555 



edged with brown, except towards the anal angle. Neuration nearly 

 as ill the last species, but the outer row of transverse cells less 

 numerous. 



RiCANIA HYALINA, Sp. n. 



Exp. al. 15 triillim. ; long. corp. 5 millim. 



Male. Head yellowish ; the carinse black, the cly|)eus marked with 

 brown lines between them ; the middle carinas not projecting on the 

 vertex, which is deeply and triangularly depressed in the middle ; 

 thorax reddish above, the middle carinee yellow ; abdomen brown 

 above, the sides marked with yellow, and the segments bordered 

 with green behind. Under surface of the body yellow, the femora, 

 the extren:ities of the first five segments of the abdomen, and a large 

 spot at each side at its extremity green; the base of the first five 

 abdominal segments rich cream-colour. 



Allied to R. pellucida, Spin., and B. panorpcBformis, Germ. 



DIPTERA. 



AsILIDjE. 



Laphria nigroc^rulea, sp. n. 



Exp. al. 28 lin. ; long. corp. 14 lin. 



Head black ; the hairs on each side in front within the eyes silvery 

 white ; beard and proboscis black ; hairs at the back of the eyes 

 slightly greyish. Thorax above inky black, hardly shining ; the 

 front, sides, and sutures clothed with white hair, inclining to silvery. 

 Legs inky black, more shining than the thorax, clothed with white 

 hair ; pulvilli brown. Abdomen deep purple, shading into green at 

 the extreme ends of the segments, and with three spots formed of 

 white hairs on each side of the first three incisions. The first seg- 

 ment of the abdomen is slightly expanded ; the remainder are of 

 nearly equal width to the extremity, the last segment being slightly 

 narrowed and subtruncated. Wings hyaline biown, with a very 

 slight purplish iridescence, and, towards the base, more transparent ; 

 halteres of a conspicuous orange-brown. 



Allied to L. aurifacies, Walk., from Borneo, and to several other 

 sj)ecies from the Malay Archipelago. 



MusciD^. 



Stilbomyia jucunda, sp. n. 



Long. corp. 7^-10 lin. 



Head black ; middle of face, antennae, &c. hoary or lead-colour ; 

 sides white ; mouth-parts reddish ; hinder orbits narrowly white. 

 Thorax and abdomen green, strongly punctured ; front of prothorax 

 edged with hoary ; abdominal segments narrowly edged behind with 

 blue-black ; thorax beneath, in the middle and hinder portion, as 

 well as the legs, black ; sides of front part of thorax green ; wings 

 hyaline (?) (discoloured in all the specimens) ; halteres white ; spines 

 on the body and legs black. 



Several specimens, without date of capture. 



Allied to S. decrescens. Walk., from iViorty Island, 



