AMERICAN DIPTEKA. 377 



again quite recently by Coquillett as occurring in Alaska, Colorado 

 and New Hampshire; by a second European species (velutina), and 

 by a third which has not heretofore been described. All have passed 

 in American collections as a single species. 



Triueura atrrrima Meig. (Plate viii, fig. 50.) 

 17U4. Mouche noire avee tin trait nnir stir la moitie du hord exterieur de l'aile. 



GeofFroy, Hist, abreg. d. Ins. d. env. Paris, ii, 533. 76 (Meigen). 

 1794. Musca aterrima. Fabricius, Ent. System., iv, 334, 93. 

 1799. Musca aterrima, Coqnebert, Illust. icon. Ins., PI. 24, fig. 3. 

 1802. Phora aterrima, Latreille, Hist. Nat. Crust, et Ins.. iii, 464. 

 1804. Trineura atra, Meigen, Klass. u. Beschr. eur. zw. Ins. 1. 2,313, PI. xv, 



fig. 22. 



1804. Pbora aterrima, Latreille, Hist. Nat. Ins. et Crust., xiv, 394; Diet. 



d'Hist. Nat., xxiv, 197,594. 



1805. Tephritis aterrima, Fabricius, Syst. Antl., 323. 



1809. Phora aterrima, Latreille, Gen. Crust, et Ins., iv, 360. 



1823. Phora atra, Fallen, Faun. Suec. Pbytomyzides, 7, 7 (Schiner); Meigen 



says Trineura atra. 

 1830. Phora atra, Meigen. Syst. Beschr., vi, 224. 

 1830. . Phora stictica, Meigen, 1. c, vi, 225. 



1849. Phora aterrima, Walker, List, etc., iv, 1138 (occurrence in N. A.). 

 1864. Trineura aterrima, Schiner, Fauna Austr. Dipt., ii, 349. 

 1892. Trineura aterrima, Strobl. Wien Ent. Zeit., xi, 204. 



(Reduces stictica to a variety.) 

 1901. Trineura aterrima, Becker, Monog. Phor., p. 80. 



GeofFroy evidently did not apply a scientific name to the species. 

 Coqnebert probably referred to the species as Musca aterrima, but I 

 can find no positive statement. The chronological order of the three 

 publications in 1804 is unknown. Meigen in 1830 regarded his 

 genus Trineura (1803) as a synonym of Phora Latr. (1796). I 

 have not ascertained the name under which Walker referred to this 

 species, but Osten Sacken records it from North America on his 

 authority. As far as T know, Schiner was the first to use the name 

 Trineura after Meigen himself discarded it. 



Wholly deep velvet-black, in the female a little less intense. Wings hyaline, 

 the heavy veins usually black, but sometimes only the costa is black and the 

 others brown, costal vein reaching a little less than half the length of the wing. 

 Fourth vein only a little curved, ending at the apex of the wing, seventh vein 

 wholly absent or very indistinct, legs velvety black, fore tibiae and tarsi yellow- 

 ish or reddish, male abdomen bent in a nearly uniform curve for the most of its 

 length. Hypopygium in consequence turned partially forward. Front tarsi 

 not enlarged, middle and hind tibiae with a single external bristle on the basal 

 half. Middle tibiae of male with four to six bristles on the hind side, female 

 with only two or three. 



TRANS. AM. ENT. SOC. XXIX. (48) DECEMBER. 1903 



