304 FAUNA HAWAIIENSIS 



(2) Hypodij-aiichis lanaiensis, sp. nov. 



%. Length 2-7 mm. Polished black ; the mandibles, except the teeth, the first 

 five joints of the antennae, and the legs are brownish-yellow; palpi pale yellowish-white, 

 the last joint of the maxillary palpi being fuscous ; tegulae rufo-piceous ; wings hyaline, 

 pubescent, the veins yellowish, the marginal cell being open along the apical two-thirds 

 of the outer margin. 



The mandibles are 3-dentate, the two outer teeth being acute. The antennae are 

 long and filiform, about the length of the body, sparsely pilose, the joints 5 to 1 3 being 

 fluted ; the flagellar joints, except possibly the first, are very nearly equal in length, 

 about four times as long as thick, joints i and 2, however, being slightly slenderer and 

 proportionately longer. The scutellum at the sides is rugose or coarsely wrinkled, the 

 cup being ellipsoidal and flat and smooth on its disk. The metathorax is finely 

 wrinkled, bicarinate above, the surface on either side of the carinae being pubescent. 

 The abdomen is scarcely so long as the head and thorax united, black, but narrowly 

 testaceous along the venter and with a narrow, pubescent girdle at base. 



Hab. Lanai (2000 feet). One % specimen, taken in December. 



Hexaplasta Forster. 

 1869. Hexaplasta Forster, Verh. zool.-bot. Gesell. Wien, xix. p. 15. 



( I ) Hexaplasta konensis, sp. nov. 



%. Length i'5 mm. Polished black; first six joints of the antennae and the 

 mandibles brownish-yellow, the apical joints of the antennae blackish ; legs, including 

 coxae, yellow ; wings hyaline, ciliate, the veins in front wings brownish-yellow, in the 

 hind wings very pale yellowish ; tegulae brownish-piceous. 



The antennae are 13-jointed and extend a little beyond the middle of the abdomen, 

 the 6 terminal joints, constituting the club, being elliptic-oval, striate, and stouter than 

 the preceding ; the first joint of the funicle is the slenderest and the longest, being 

 about one-half longer than the second, while the second and fourth joints are equal, 

 a little longer than the third. The scutellum is rugulose at sides, the cup being smooth, 

 its disk sub-concave, with a depression or fovea at apex. The metathorax is short, 

 finely rugulose and pubescent. The abdomen is normal, hardly as long as the head 

 and thorax united, with the usual woolly girdle at base. The wings are badly torn at 

 apex, but enough remain to make out the colour of the veins and to see that the 

 marginal cell was closed along its front margin. 



Hab. Hawaii : Kona (2500 feet). One % specimen, taken in July. 



