346 FAUNA HAWAIIENSIS 



2. Thorax not entirely black, usually brownish, castaneous, dark rufous, or pale 



ferruginous, sometimes marked with black 4. 



Thorax entirely black. 



Terminal abdominal segments never dusky or blackish 3. 



Terminal abdominal segments always dusky or blackish. 



Abdominal segments 2 to 3 or 2 to 4 in $ and 3 to 4 or to 5 in 

 $ rufous, the rest dusky or blackish ; transverse median nervure 

 in hind wings with the first abscissa about half the length of the 

 second recurrent nervure more than twice the length of the width 

 of the third discoidal cell at base {2) E. kaalae. ? , cj. 



3. Abdominal segments 3 to 8 castaneous or dark rufous. 



Tibiae and tarsi and more or less of the trochanters ferruginous ; antennae 



nearly as long as the body, light brown ^3) E- waimeae. 



4. Thorax immaculate or only faintly dusky at sides or in the sutures 5. 



Thorax distinctly marked with black. 



Thorax dark rufous or castaneous, the metanoturn, disk of mesonotum, 

 more or less, and the mesosternum black ; legs, except apical half of 

 femora, which is black, pale ferruginous ; second recurrent nervure about 

 thrice as long as the width of the third discoidal cell at base {4) E. variegatus. 



Thorax paler ferruginous, the metanoturn from the transverse carina, the 

 middle lobe of the mesonotum and the mesosternum black ; legs pale 

 ferruginous, abdomen with the sides, from 3rd segment, with a fuscous 

 band ; second recurrent nervure about twice as long as the width of the 

 third discoidal cell at base ; antennae yellowish, much longer than 

 the body iS) E. nigrolineatus. 



5. Thorax and abdomen, or the head and abdomen pale ferruginous or yellowish 



brown 6. 



Thorax and abdomen castaneous or dark rufous. 



Legs ferruginous ; orbits and face, except sometimes a dusky median 

 streak, pale yellowish or whitish ; antennae in 9 shorter than the body, 

 in $ as long or a little longer than the body ; second recurrent nervure 

 more than twice longer than the width of the third discoidal cell at 

 base ; transverse median nervure in hind wings with the first abscissa 

 scarcely half the length of the second abscissa (<5) E. castanais. 



6. Disco-cubital nervure forming a curve, not angulated ; second recurrent nervure 



about four times as long as the width of the third discoidal cell at 

 base ; transverse median nervure not interstitial with the basal nervure ; 

 antennae in ? considerably longer than the body (7) E. henshawi. 



Disco-cubital nervure angulated a little before the middle; second recurrent 

 nervure only about twice the length of the width of the third discoidal cell at 

 base ; transverse median nervure interstitial with the basal nervure ; antennae 

 in 5 not longer than the body (8) E. molokaiensis. 



7. Ferruginous ; abdomen much darker or brown ; antennae as long as or longer 



than the body iO) -E- longkornis. 



