451 



Hevaheva liyaVnm n. sp. 



Size of body and wings about the same as in H. silvcstris. Color of 

 body about the same or a little lighter, but forewings hyaline or nearly 

 so, very slightly browned or smoky, not opaquely colored; legs and 

 antennae lighter colored or similar. Hairs on body surface and wing 

 veins much shorter and somewhat less conspicuous. 



Structural characters about the same, but antennae a little longer 

 and genal cones a little larger ; wing venation similar, but setae shorter ; 

 genitalia similar, differing only in minor characters. 



Distribution : — Island of Hawaii — Olaa, Glenwood, eleva- 

 tion 2400 ft., September 9, 1917 (W. M. Giffard), 1 pair. 



This species appears to be a derivative of H. silvestris by 

 segregation on a separate island. Further collecting, however, 

 is necessary to establish the relationships beyond doubt. 



Hevaheva moiiticola Kirkaldy. 



Length of body 1.4 mm.; length of forewing 2.1 mm. General color 

 brown ; vertex, posterior half of dorsulum, and notum between fore- 

 wings very light brown or orange ; antennae orange, except last two 

 segments black ; femora and tibiae brown, tarsi lighter ; forewings hya- 

 line but clouded and maculated with brown as indicated in figure. 

 Body surface with stiff pubescence. 



Head rather broad, as broad as mesothorax but narrower than meta- 

 thorax, declivous ; vertex about half as long as broad, with a deep discal 

 depression on each side of median suture and much elevated narrowly 

 on posterior margin, with a few long hairs near posterior ocelli. Genal 

 cones about two-thirds as long as vertex, conical, subacute, only a little 

 divergent, sparsely pubescent. Antennae only a little longer than width 

 of head, slender, distal segments with setae. 



Thorax rather narrow, not much arched, surface with scattered, stiff 

 hairs ; leg rather short, stout, femora thick ; hind tibiae with about 

 7 short black spines at apex. Forewings elongate, rounded at apex, veins 

 prominent, setose ; marginal cells subequal or first a little larger than 

 second ; radial margin thick ; membrane maculated with brown conspic- 

 uously. 



Male genitalia small ; forceps about half as long as anal valve, sharply 

 curved inward and acute at apex, rather slender. Anal valve straight on 

 anterior margin, roundly convex on posterior. Female genital segment 

 short and thick, about half as long as abdomen, aliruptly tapering to 

 acute apex; valves subequal. 



Distribution : — Island of Oahu — Mt. Tantalus, elevation 

 2000 ft., October (Perkins) ; Palolo Hills (Swezey) ; Kaumu- 

 ohona (Swezey). 



