ALDRICH : DOLICHOFUS AND H VGROCELEUTHUS. 5 



Male fore tibiae not incrassated at tip 7'igilans, n. sp. 



49- Middle tarsi of male with long hairs abo\'e on first joint. . . . 



co)]iatus, Loew. 



Middle tarsi plain . . ' 50 



5°- Fore coxae pale 51 



Fore coxae dark 56 



51- Blackish-bronze species ; size 3 mm bniniieus, n. sp. 



More or less green species, much larger 52 



52. Fore tarsi of male plain 53 



Fore tarsi of male enlarged discifer, Stannius. 



53. Antennae entirely black melatwcerus, Loew. 



First joint reddish below 54 



54. Length about 6 mm. ; hind tibia; of male with longer bristles 



than usual setosns, Loew. 



Length about 4 mm.; hind tibiae as usual 55 



55. Basal half of fore co.Xte with minute whitish hairs 



platyprosopus, Loew. 



Basal half of fore co.xai with minute black hairs. />7r/jrw/-a//j, Loew. 



56. Fore tarsi of male plain prceustus, Loew. 



Fore tarsi of male enlarged 57 



57. First three joints of male fore tarsi with black tips 



pollex, Osten Sacken. 



First three joints of male fore tarsi wholly yt\\o\^ .obcordatus,x\.%^. 



58. Hind tarsi entirely black 59 



Hind tarsi considerably pale at base 65 



59. Third joint of antennte almost entirely yellow. . . .gracilis, n. sp. 

 Third joint largely or wholly black 60 



60. Third joint of antennae large and pointed ; wings narrowed 



at base augiistatiis, n. sp. 



Third joint and wings as usual 61 



61. Male fore tarsi enlarged 62 



Male fore tarsi not enlarged 64 



62. x\nal angle of wing in male with two lobes lobatus, Loew. 



Anal angle as usual 63 



63. First joint of antennse chiefly or wholly black. .^//jv//i'r, Stannius. 



First joint yellow, the following black agilis, n. sp. 



Whole antenna yellow except apical half of third joint.. . 



p'igil, Loew. 



64. Lamellae of hypopygium with numerous long, black bristles 



• marginatus, n. sp. 



Lamellse of hypopygium witli the usual short, curved bris- 

 tles fulvipes, Loew. 



65 Third joint of antenme black 66 



