366 
257. 
258. 
259. 
260. 
261. 
262. 
263. 
271. 
272. 
ku 
v C7 v vv Uv 
"CU 
DIPTERA 
. tachistiformis, nov. sp. 
. teniatus, Meigen, Syst. Beschr. Vol. 3, p. 88 [1822] (Tachydromia) ; 
Strobl. Mitteil. Naturw. Ver. Steiermark, Graz, Vol. 46, p. 78 [1909] 
(Tachydromia). 
. lalarís, nov. sp. 
. leclifrons, Becker, Ann. Mus. eod, St. Petersbourg, Vol. r2, p. 314 
[1907] (Tachydromia). 
. tenax, nov. sp. 
tenellus, Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 223, f. 28, 3o 
(1902). 
. teneriffensis, Becker, Mitteil. Zool. Mus. Berlin, Vol. ^ P- 41 [1908] 
(Tachydromia). 
. tenuis, nov. sp. 
. lergestinus, Egger, Verh. Zool.-bot. Ges. Wien, Vol. 1o, p. 345 (1860). 
tersus, Coquillett, Proc. U. S. Nat. Mus. Vol. 18, p. 439 (1895); 
Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 219 (1902). 
. testaceus, Philippi, Verh. Zool.-bot. Ges. Wien, Vol. 15, p. 767 (1865); 
Bezzi, Ann. Mus. Hungar. Vol. 3, p. 459 [1905] (Tachydromia) ; 
Nova Acta Akad. Naturf. Halle, Vol. 9r, p. 402 [1909] (Tachydromia). 
. thoracicus, Lundbeck, Dipt. Danica, Vol. 3, p. 317 [1910] (TacAy- 
dromia); Collin, Ent. M. Mag. London (2), Vol. 24, p. 130 [1913] 
(Tachydromia). 
. libialis, Stephens, Syst. Cat Brit. Ins. Vol. 2, p. 265 [1829] (Tachy- 
dromia), no description. 
. trivialis, Loew, Berl. Ent. Zeitschr. Vol. 8, p. 88: Cent. 5, No. 76 
(1864); Coquillett, Proc. U. S. Nat. Mus. Vol. 18, p. 438 (1896); 
Proc. Ent. Soc. Wash. Vol. 5, p. 265 (1903). 
. turgidus, Becker, Zeitschr. Hym. Dipt. Vol. 7, p. 118 [1907] (Tachy- 
dromia). 
. uncinatus, nov. sp. 
. unguiculatus, Zetterstedt, Ins. Lappon. p. 551 [1838] (Tachydromia); 
Dipt. Scand. Vol. 1, p. 291 [1842] (Tachydromia) ; Scholz, Zeitschr. 
Ent. Breslau, Vol. 5 (19), p. 58 [1851] (Tachydromia); Schiner, 
Fauna Dipt Austr. Vol. 1, p 9o (1862); Strobl, Progr. Seitenstetten, 
Vol. 14, p. 8 (1880); Becker, Berl. Ent. Zeitschrift, Vol. 31, p. 134 
[1887] (Tachydromia); Strobl, Mitteil, Naturw. Ver. Steiermark, 
Graz, Vol. 29, p. 111 [1892] (Tachydromia); Frey, Zeitschr. Hym. 
Dipt. Vol. 7, p. 412 [1907] (Tachydromia); Medd. Soc. Fenn. Hel. 
singfors, Vol. 34, p. 21 [1908] (Tachydromia); Strobl, Mitteil. 
Naturw. Ver. Steiermark, Graz, Vol. 46, p. 80 [1909] (Tachydromia) ; 
Wahlgren, Ent. Tidskr. Vol. 31, p. 95 [1910] (Tachydromia) ; Frey, 
Acta Soc. Sc. Fenn. Helsingfors, Vol. 37 (3). p. 82, f. 23 [1913] 
(Tachydromia). 
273. P. univittatus, Loew, Oefv. Kongl. Vet. Akad. Fórhandl. Vol. 14, p. 371 
(1857); Dipterenf. Südafrik. Vol. 1, p. 269 (1860); Adams, Kansas. 
Univ. Sc. Bul. Vol. 3, p. 158 (1905). 
274. P. valens, nov. sp. (1). 
Montana. 
C. Europe. 
North America. 
Tibet. 
Washington. 
United States. 
Canary Islands. 
Washington. 
S. Europe. 
E. United States. 
Chile. 
Denmark. 
E. United States. 
Algeria. 
Costa Rica. 
N. & C, Europe. 
S. Africa. 
Java. 
(1) Platypalpus valens, nov. sp. — Female. Length 4 mm. Robust, head, thorax and abdomen black, 
legs yellow, tarsi not annulate, tibial spur very large, antennas short, posterior crossvein oblique. Front long and 
narrow, scarcely wider above, face linear; palpi white without, yellowish within, with a few strong white sete, 
proboscis one-half the height of the head, black; antennze three-jointed, the basal joint minute, the third joint ovate, 
scarcely longer than wide, the arista thin, very sparsely hairy and nearly three times as long as the antenne, 
Mesonotum with sparse golden dust, the bristles black, upper pleurz entirely pruinose, fringe of calypteres strong and 
