3i6 FAUNA HAWAIIENSIS 



5. Head and thorax bright emerald-green, the abdomen above blue-green. 



Abdomen shorter than the head and thorax united ; ovipositor fuscous, 

 shorter than the hind tarsi ; middle legs, all trochanters, anterior 

 tibiae, except outwardly medially, apex of hind femora, base and apex 

 of hind tibiae and all tarsi, except the last joint of the anterior and 

 middle tarsi and the last two joints of the hind tarsi, brownish- 

 yellow (j) E. splendissimus. 



Head and thorax metallic green, peacock or blue-green. 



Abdomen longer than the head and thorax united, not strongly punctate ; 

 ovipositor variable in colour and lengtli, usually a little shorter than the 

 hind tarsi, rarely as long ; middle legs, sutures of trochanters (sometimes 

 wholly), knees, more or less, extreme apex of tibiae, extreme base of the 

 anterior and hind tarsi, and the middle tarsi, except the last joint and 

 the teeth, brownish-yellow {4) £■ vulgaris. 



6. Gold-green. 



Abdomen much longer than the head and thorax united, closely uniformly 

 punctate, except at the extreme base, where it is smooth ; ovipositor 

 fuscous, as long or a little longer than the hind tarsus ; legs mostly 

 brownish-yellow, the anterior and hind coxae and the hind femora, 

 except at tips, metallic, the front and hind tibiae more or less, and 

 apical joints of tarsi embrowned (S) -^^ molokaiensis. 



7. Ovipositor rarely much shorter than the hind tarsi 8. 



Ovipositor much shorter than the hind tarsi, not longer than the basal joint. 



All coxae, legs, and scape of antennae, yellow ; head aeneous-black, 



impunctate ; thorax and abdomen metallic green {6) E. xanthopus. 



Anterior and hind coxae metallic, rest of legs testaceous, the scape 

 aeneous; head blue-green, sculptured; posterior half of the mesopleura 

 and the abdomen cupreous {?) E. hawaiiensis. 



8. Body metallic green but variable, the head frequently blue-green or aeneou.s- 



black ; ovipositor variable in si/e and colour, fuscous at base and apex and 

 yellowish medially (typical) or wholly fuscous or yellowish, or fuscous only at 

 the base {8) E. flavipes. 



9. Metallic green to dark blue-green. 



Dark blue-green, the legs metallic, the tibial spurs and the extreme base 

 of first joint of middle and hind tarsi, yellowish-white, with sometimes 

 one or two of the following joints pale beneath, the anterior tarsi more 



or less yellowish or whitish {4) E. vulgaris. 



Metallic green, the legs, except the coxae, brownish-yellow (8) E. flavipes. 



(i) Eiipelnnis niger, sp. nov. 



$. Length 5 mm. ; ovipositor the length of the hind tarsi. Robust, black ; 

 mandibles toward base rufous, the anterior and middle tarsi, and anterior and hind 

 tibial spurs brownish-yellow, the hind tarsi dark fuscous, with a pale ring at base, the 

 middle tibial spur black ; wings subhyaline, clear hyaline at extreme base. 



