DIAPHORUS. 217 



a. Body uniformly metallic ; bristles of the thorax black. Species 1-4. 

 a a. Abdomen at least partly yellow ; bristles of the thorax yellowish. 

 Species 5, 6. 



1. nigripes, Fb. s. a. 269. 12 (1S05); Mg. ; Mq. — f/mm'meus, 

 rin. ; Ztt. — copiosus, Mg. ; Mq. j.'Eiieo-viridis, antennis nigris, alis 

 hyaliuis, halteribus flavis, pedlhm ceneis, tih'us ferruc/ineis, larsis uif/ris ; 

 Mas. tihiis posficis ohscuris. Long. 1 ; alar. 2 lin. 



Brassy-green or bluish-green. Eyes golden-green. Mouth black. 

 Thora.K schistaceous beneath. Coxfo cinereous, with pale or ferruginous 

 trochanters ; anterior metatarsi pale. Male. Hind tibiae blackish, 

 brown in the recently disclosed insect. Fetn. Hypostoma moderately 

 narrow, whitish. 



Generally distributed. (E. S. I.) 



2. Isesus, Wd. z. m. iii. 73. 21 (1818); Mg. ; Mq. ; Ztt. 

 .-Eneo-viridis vel viridi-caerulescens, antennis nigris, alis hyaliuis, hal- 

 teribus flavis, pedihus ni(jricuntihus,ffimorihm reneis, geiiubus ferrngineis. 

 Long. 1 ; alar. 2 lin. 



Green, or blue, or with the thorax blue and the abdomen green ; 

 a little smaller than C. niyripes, and with the third joint of the antenuce 

 larger. Tibice quite black ; knees pale, especially in the female, whose 

 hypostoma is glaucous- green. 



Not common. (E.) 



3. viridulus. Flu. dol. 18. 23 (1823); '/.ti. —neglectus, Wd. ; 

 Mg. ; Mq. iEneo-viridis, antennis nigris, alis hyaliuis, halteribus 

 pedibusqiie Jlavis, tarsis apice nigris ; Foem. femoribus medio nigris. 

 Long. 1 ; alar. 2 lin. 



Brassy-green. Front green. Antennae black. Scutellum of the 

 male sometimes blue ; pleurae schistaceous. Wings hyaline. Halteres 

 and legs yellow ; tarsi with black tips, Male. Posterior coxae cine- 

 reous. Fern. Hypostoma narrow, white. Coxae cinereous ; femora 

 brassy-black, more or less yellow at the base and at the tips. 



Generally distributed. (E. I.) 



4. cilipes, Mg. zw. iv. 41. 3 (1824). Aureo-viridis, antennis 

 nigris, alis hyaliuis, halteribus pedibusqae Jlavis, femoribus tibiisque pos- 

 ticis apice nigris, tarsis posticis nigris, auterioribus fuscis basi Jlavis. 

 Long, f ; alar. 1^ lin. 



Golden-green. Antennfe black. Wings hyaline. Halteres and 

 legs yellow ; hind femora and hind tibia with black tips ; anterior tarsi 

 brown, with the metatarsus yellow ; hind tarsi black. 



Not rare. (E. I.) 



5. moUiculus, Fin. dol. 23. 35 (1823); Zii.—latus, Mg. Aureo- 

 viridis, antennis nigris, alis cinereis, venis pallidis transversa discali in 

 medio aire sita, halteribus pedibusque flavis ; Fcem. abdomineflavo, dorsn 

 macula basali viridi, ano nigro. Long, f-1 ; alar. 2-2| lin. 



VOL. I. 2 F 



