DOLICIIOPUS. 37 



the tip of the first joint, which is sometimes the case in g , but 

 only in very dark-colored specimens. 



Hab. Middle States. (Osten-Sacken.) Illinois. (Kennicott.) 



lO. I>. "brevipennis Meig. % and 9. — Aeneo-viridis, antennis, 

 oculorum tegularumque ciliis nigris, coxis anticis praeter basiin pedi- 

 busque flavis, triente tibiarum posticarum apicali, tarsis intermediis 

 inde ab articuli primi apice, posticisque totis nigris. 



%. Tarsis anticis attenuatis, articulis duobus ultimis atris, compressis, 

 ultimo eximie dilatato, femoribus posticis pallide-ciliatis. 



9 . Pedibus simplicibus, tarsis anticis inde ab articuli primi apice nigris. 



Metallic-green ; antennae, cilia of the inferior orbit and of tbe tegulse black ; 



fore coxae, excepting tbe basis, and feet yellow ; the last third of the 



hind tibiae, the middle tarsi from the tip of the first joint and the whole 



hind tarsi black. 

 % . Fore tarsi attenuated, the two last joints black, flattened, the last one 



extremely enlarged ; the hind femora ciliated with pale hairs. 

 9 . Feet plain ; the fore tarsi from the tip of the first joint black. Long. 



corp. 0.24— 0.25. Long. al. % 0.22; 9 0.24—0.25. 



Syx. Dolichopus plumitarsis (var. B.) Fallen, Dol. 10, 4. 



Dolichopus brevipennis Meigen, Syst. Beschr. IV, 89, 27. — Stanxius, Isis, 

 1831, 60, 12. — Zetteestedt, Ins. Lapp*. 700, 8. — Staeger, Kroyer 

 Tidsskr. IV, 23, 13.— Zetteestedt, Dipt. Scand. II, 603.— Walker, 

 Dipt. Brit. I, 160, 10. 



Dark metallic green, bright. Front green. Antenna? black. 

 Face of the g grayish-yellow; that of the 9 grayish-white, 

 slightly yellowish, much broader than in the J\ Palpi brown. 

 Cilia of the inferior orbit black. Hypopygium black. Lamellae 

 large, oblong-ovate, dingy-yellowish, with a broad black border, 

 on the apical margin somewhat jagged and fringed with crooked 

 black bristles. The hind coxae blackish, only on the extreme tip 

 yellow. Fore coxae yellow, hairy with black ; on the outside of 

 the basis with a somewhat triangular greenish-black spot. Feet 

 yellow. Hind femora before the end only with one bristle ; in the 

 J 1 they are sparsely ciliated beneath with very long, yellowish 

 hairs. On the hind tibiae the last third at least is black ; hind 

 tibiae of the £ perceptibly stronger than those of the 9 , but not 

 near so strong as those of the male of D. pachycnemus ; they 

 have no large bare spot upon their hind side, but at the end of 

 the upper side a straight, pale, longitudinal line occupying the 

 whole of their last third. The fore tarsi of the J" are about 1| 



