498 



Thorax metallic green, prothorax largely black, becoming polli- 

 nose with age; suture between pronotum and the proepimeron indis- 

 tinct; caudal lobe of the notum much narrower than the cephalic lobe 

 and considerably widened on the meson ; furrow separating the median 

 lobes obscure ; cephalic portion of the prescutum small, triangular, and 

 little depressed ; mesosupraepisterna and mesepimera green, the meso- 

 pleural suture and the dorsal carina with pale lines which become dark 

 with age; mesinfraepisternum black, the metapimera, metepisterna 

 and intersternum pale at first but black or pollinose with age ; legs buff 

 and black ; coxae pale and black, femora almost entirely black, with 

 a narrow pale stripe between the setal rows on the ventral surface, and 

 a short stripe on the dorsal surface of the hind femora; rows of front 

 femoral setae consisting of two and eight setae respectively ; tibiae and 

 tarsi black ; wings clear, the antenodal cross-veins two, postnodals fif- 

 teen to seventeen in the front wings and twelve to thirteen in the hind 

 wings; M 2 arising between the fourth and fifth postnodal cross-veins in 

 the front wings and between the third and fourth in the hind wings ; 

 stigma usually surmounting three cells, light brown or nearly white in 

 color. 



Abdomen metallic green and black ; terga 1-6 with narrow lateral 

 stripes, 7-10 black; sterna of all segments black, the first sometimes 

 light, but black in older specimens ; superior anal appendages black, the 

 lateral surfaces tuberculate and the mesal margins with a basal hook 

 and two indentations between this and the apical third ; inferiors long 

 and slender, not dilated at the apex (Figs. 129, 130). 



Female. — Color, metallic green and black. 



Head and thorax similar to those of the male. 



Abdomen long and very slender, the dorsum of terga 1-10 and 

 apical rings on all terga except the two caudal ones dull brown or 

 greenish ; sterna 2-8 mostly black, ovipositor long and slender, the 

 prostyles long and the eighth sternites at the base of the cephalic pair 

 of gonapophyses with a long dorso-caudal projection. 



'Measurements 



Length, S 43-47 mm. 



Length, 5 43-45 mm. 



Length of abdomen, $ 34—38 mm. 



Length of abdomen, $ 34—36 mm. 



Length of hind wings, $ 21-25 mm. 



Length of hind wings, $ 26-27 mm. 



Width of hind wings, $ 5 mm. 



Width of hind wings, $ 6 mm. 



