56 DIPTERA 
3. T. clavipes, Meigen, Syst. Beschr. Vol. 6, p. 336 (1830); Haliday, Ent. Europe; North America. 
Mag. London, Vol. r, p. 158 (1833); Macquart, Hist. Nat. Dipt. 
Vol. t, p. 346 [1834] (Microphorus) ; Zetterstedt, Dipt. Scand. Vol. r, 
p. 254 [1842] (Microphora) ; Walker, List. Dipt. Vol. 3, p. 488 [1842] 
(Microphorus); Scholz, Zeitschr. Ent. Breslau, Vol. 5, p. So [1851] 
(Microfhora); Walker, Ins. Brit. Dipt. Vol. r, p. 114, pl. 4. f. 5 
[1851] (Microphorus); Bonsdorff, Finl. tvàv. Ins. Vol. 1, p. 144 [1861] 
(Microphora); Schiner, Fauna Dipt. Austr. Vol. r, p. 79 [1862] 
(Microphorus); Loew, Zeitschr. Ent. Breslau, Vol. 17, p. 35, 4o 
(1864); Becker, Berl. Ent. Zeitschr. Vol. 31, p. 133 (1887); Strobl, 
Mitteil. Naturw. Ver. Steiermark, Graz, Vol. 29, p. 93 (1892); 
Wien. Ent. Zeit. Vol. 18, p. 26 (1899); Mem. Soc, Esp. Hist. 
Nat. Vol. 3, p. 311 (1906); Mitteil. Naturw. Ver. Steiermark, Graz, 
Vol. 46, p. 72 (1909); Lundbeck, Dipt. Dan. Vol. 3, p. 187 (1910); 
Wahlgren, Ent. Tidskr. Vol. 31r, p. 77 (1910); Frey, Acta Soc. Sc. 
Fenn. Helsingfors, Vol. 37 (3), 58 (1913). 
minuta, Fallen (not Fabricius nor Walker) Empid. Suec. 32, p. p. [1816 
(Empis) [see also CEdalea flavipes Zett.]; Zetterstedt, Fauna Ins. Lappon. 
p. 538 [1838] (CEdalea). 
? pallipes, Zetterstedt, Fauna Ins. Lappon. p. 538, male only [1838] (Gdalea). 
var. lissonota, Bezzi, Bull, Soc. Ent. Ital. Vol. 3o, p. 144 (1899). Italy. 
var. sexsetosa, Frey, Acta Soc. Sc. Fenn. Helsingfors, Vol. 37 (3), p. 58 (1913). Finland, 
4. T. elongata, Haliday, Ent. Mag. London, Vol. r, p. 158 (1833); Walker, N. Europe. 
List Dipt. Brit. Mus. Vol. 3, p. 488 [1849] (Microfhorus); Loew, 
Zeitschr. Ent. Breslau, Vol. 14, p. 40 (1863); Frey, Acta Soc. Sc. 
Fenn. Helsingfors, Vol. 37 (3), p. 59 (1913). 
fuscipes, Zetterstedt, Fauna Ins. Lappon, p. 540 [1838] (Trichina); Dipt. 
Scand. Vol. 1, p. 256 [1842] (Microphora), Vol. 8, p. 2999 [1849] (Micro- 
phora).; Scholz, Zeitschr. Ent. Breslau, Vol. 5, p. 5o [1851] (Microphora) ; 
Walker, Ins. Brit. Dipt. Vol. 1, p. 115 (1851); Zetterstedt, Dipt. Scand. 
Vol. 13, p. 4982 [1859] (Microphora); Schiner, Fauna Dipt. Austr. Vol. 1, 
p- 79 (1862) ; Loew, Zeitsch. Ent. Breslau, Vol. 17, p. 46 (1864) ; Strobl, 
Mitt. Naturv. Ver. Steiermark, Graz, Vol. 29, p. 92 (18931. 
minuta, Walker (not Fallen), Ins. Brit. Dipt. Vol. 1, p. 115 [1851] (Micro- 
phorus). r 
5. T. nigripes, Strobl, Mitteil. Naturw. Ver. Steiermark, Graz, Vol. 34, p. 206 C. Europe. 
(1898); Jahrb. Naturh. Mus. Kárnten, Klagenfurt, Vol. 47, p. 2ot 
(1901). 
6. T. nitida, nov. sp. (1). Missouri. 
acrostichals ; pleurz entirely pollinose. Abdomen with long pale hairs; pygidium rather large, the lateral valves 
convex, tipped with a row of black denticles, a pair of dorsal filaments present, Legs not shining, simple, the hairs 
entirely black, front tibie not noticeably swollen, cilia of the hind femora shorter than the diameter of the femur. 
Calypteres and halteres piceous brown. Wings broadest in the middle, strongly infumated beyond the basal cells, 
veins strong, stigma distinct, discal cell slightly shorter than the second basal, petiole of the second and third veins 
arising over the basal fourth of the second basal cell, sections of the fourth vein proportioned 1 : 0.2 : 1 : r, of the 
fifth vein, 1.6 : 0.7 : 1 : 1, last two posterior veins interrupted just before the margin, anal crossvein strongly reflexed, 
meeting the anal vein at an angle of one hundred twenty-five degrees, the anal vein vanishing much before the margin. 
One specimen : Stanford, California, February 4, 1906, received from Dr. Aldrich. 
(1) Triehina nitida, nov. sp. — Male. Length 2 mm. Black over all, the legs fuscous, paler apically. 
Occiput fulvous pollinose, its sparse hairs yellowish, third antennal joint four times as long as wide, its basal half 
barrel-shaped, its apical half cylindrical, the style minute. Mesonotum and most of pleurze polished, the posterior 
portion of pleurz lightly pollinose, bristles black, six scutellars, acrostichals and nmotal hairs very sparse and short. 
Abdominal hairs fine, sparse and pale, genitalia erect, globose, pollinose, the side parts ending in back above in a 
strong jet-black claw, the point directed forward. Legs simple, the posterior femora and hind tibiz bearing rows of 
fine hairs. Halteres black, Wings normal, subhyaline, stigma weak not filling the end of the marginal cell, 
Female. Front shining, wider than the third antennal joint 
Two specimens, Atherton, Missouri, May, received from Dr, C. F. Adams, 
