DIAPHOEUS. 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 (1805); Mg. ; M.q.gramineus, 

 Fin. ; Ztt. copiosus, Mg. ; Mq. ^Eneo-viridis, antennis nigris, alis 

 hyalinis, halteribus flavis, pedibus ceneis, tibiis ferrugineis, tarsis nigris ; 

 Mas. tibiis posticis obscuris. Long. 1 ; alar. 2 lin. 



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

 Thorax schistaceous beneath. Coxa? cinereous, with pale or ferruginous 

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

 brown in the recently disclosed insect. Fern. Hypostoma moderately 

 narrow, whitish. 



Generally distributed. (E. S. I.) 



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

 ^Eneo-viridis vel viridi-caerulescens, antennis nigris, alis hyalinis, hal- 

 teribus flavis, pedibus nigricantibus, femoribus ceneis, genubus ferrugineis. 

 Long. 1 ; alar. 2 lin. 



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

 a little smaller than C. nigripes, and with the third joint of the antenna 

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

 hypostoma is glaucous green. 



Not common. (E.) 



3. viridulus, Fin. dol. 18. 23 (1823); Ztt.neglectus, Wd. ; 

 Mg. ; Mq. ^Eneo-viridis, antennis nigris, alis hyalinis, halteribus 

 pedibusque flavis, tarsis apice nigris ; Fcem. femoribus media nigris. 

 Long. 1 ; alar. 2 lin. 



Brassy-green. Front green. Antennas 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 hyalinis, halteribus pedibusque flams, femoribus tibiisque pos- 

 ticis apice nigris, tarsis posticis nigris, anterioribus fuscis basi flavis. 

 Long, f ; alar. \\ lin. 



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

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

 brown, with the metatarsus yellow ; hind tarsi black. 



Not rare. (E.I.) 



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

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

 media alee sita, halteribus pedibusque flavis ; Fcem. abdominejlavo, dorso 

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



VOL. I. 2 F 



