3o8 FAUNA HAWAIIENSIS 



3. Wings mostly subfuliginous 6. 



Wings hyaline, with a more or less discoidal cloud, which is sometimes reduced 



to a small dusky cloud, or spot, just beneath the apex of the stigmal vein 4. 



4. Apex of the wings smoky or dusky 5. 



Apex of the wings clear, not smoky. 



Head and thorax bronzed green, shagreened or feebly shagreened, the 

 thorax at sides and beneath sometimes differently coloured. 



Coxae aeneous black, the femora brown-black, the trochanters, tibiae 

 and tarsi, except the last joint, brownish-yellow ; abdomen aeneous 

 black, strongly triangularly produced towards base beneath ; funicle 



joints wider than long (j) T. affinis. 



Coxae and femora metallic, the middle and posterior tibiae usually 

 fuscous, the knees and the anterior tibiae (sometimes middle tibiae) 

 honey-yellow, or brownish-yellow ; funicle joints subquadrate, 2 to 

 4 wider than long (./) T. tarsata. 



5. Head and thorax bright bronzed green; abdomen and legs aeneous-black, a dot 



on the knees and all tarsi, except the last joint, light brown or brownish- 

 yellow (5) T. nicbilipennis. 



6. Blue-black, polished ; tarsi honey-yellow ; a space at basal third of the wings, 



extending narrowly beneath the marginal vein and the triangular space 



formed by the postmarginal and the stigmal veins, hyaline (6) T. nigrocyanea. 



( I ) Toxeiiiim hawaiiensis, sp. nov. 



$. Length 2 '8 to 3 mm. Head and thorax gold-green, shagreened, the antennae 

 brown-black, the legs metallic, the tibiae and tarsi, except the last joint, pale ferru- 

 ginous or brownish-yellow, the abdomen bottle-blue or blue-green, while the wings 

 are hyaline with the veins yellowish. 



The antennae are 1 3-jointed with 2 minute ring -joints ; the flagellum is subclavate, 

 the first three joints being a little longer than thick, the fourth is scarcely as long as 

 wide, the fifth and sixth distinctly wider than long, while the club is ovate and com- 

 posed of three closely united joints. The metathorax has a distinct median carina and 

 with lateral carinae bounding the pleura. The marginal and postmarginal veins are 

 long, the former being a little the longer, while the stigmal vein is distinctly clavate and 

 about half the length of the postmarginal. The abdomen is pointed ovate, as long 

 as the head and thorax united, the second segment being much the largest, occupying 

 nearly half the length of the abdomen, or as long as segments 3 to 5 or 6 united, the 

 seventh being usually conically pointed. 



t. Length 2-4 mm. Agrees well with the $, except that the anterior and middle 

 femora are brown, that none of the funicle joints are longer than thick, and that the 

 abdomen is oblong-oval, depressed and shorter than the thorax. 



Hab. Hawaii : Kilauea, ^ and % in August ; Kona (4000 feet), in July. 



