FAM. EMPIDID/E : 55 
discal setulee almost wanting ; pleurze usually largely shining. Abdomen cylindrical, loosely hairy, pygid- 
ium of moderate size, often spinulose at the apex, no drawn-out ovipositor. Legs rather slender, 
simple, thehind tibiae sometimes clavate, no true bristles, the hind femora ciliate with erecthairs. "Wings 
large, anal angle prominently projecting, rectangular, costa evanescent beyond the fourth vein, with a 
basal bristle and rather weak marginal hairs, auxiliary vein extending close to the first which ends at 
three-fifths the wing-length, discal cell large, placed in the middle of the wing, emitting three posterior 
veins, basal cells large, subequal, anal crossvein reflexed, abruptly meeting the nearly complete but faint 
anal vein. 
Tyne species : T. clavifes, Meigen (Pl. I, Fig. 8). 
'TThe name Tvichina was used by Owen for the well-known genus of roundworms and as the 
Dipterous genus was neglected and of no economic importance the homonym has unfortunately come 
into general usage. This has resulted in a score of names connected with the roundworm disease, such 
as Trichinosis, Trichinotic, Trichiniferous, Trichinoscope, etc. Loew, in 1864, suggested that Dip- 
terists concede Meigen's right of priority and change the Empid name, but Railliet in 1895 adopted 
an easier solution of the difficulty by proposing the term Tichinella for the conflicting Nematode. 
KEY TO NORTH AMERICAN SPECIES OF TRICHINA 
1. Third antennal joint subcylindrical, much longer than thestyle . . 
"Third antennaljoint more or less conical, subequalto the style . . . .. . . . . . . . & 
2 Pleure pollinose; pygidium small, side parts rounded; legs black; 8 scu- 
INN Ca e de GUNDAM e heo. 7 oW o OESATRIPES, Melander. 
Pleurz polished; side pices of pygidium terminating above in a strong jet- 
blaeiselaw:; legsfuscous; 6schtellarS(MO.) .—.. e. oos le o s T. NITIDA, noy. sp. 
2. Dep wills black: scutellum wit: GO OPTIO DrSHes; .. 1. 2 S eo oA 
Descdarpelw vellowish: scutellum-wiHi a orO briseles, . . 9. 9 Seu s so 
4. Wings pale at base, brownish on apical half: acrostichals bristle-like ; side 
pieces of pygidium terminating posteriorly in.a pecten. (Cal.). . . . T. BasaLis, nov. sp. 
Wings uniformly dusky; acrostichals not prominent; side pieces of pygid- 
ium ending in a finger-like process at the base of which is a reduced 
pescten-OQWashr MONE) 0S 00 oo. do liess. V T. PULLATA. nOV; sp. 
5. Stigma filling end of marginal cell; scutellum with four bristles; front of 
female about as broad as last antennal joint. (Ont., Me., Mass., N. Y.) T. Numa, Melander. 
Stigma not filling end of marginal cell; 6 scutellars; front of female very 
HBHRON dGQULNED se. v on S. uua Lo. vw vos EurLAVIPRS, Meigen. 
Geographical distribution. 
I. T. atripes, Melander, Trans. Am. Ent. Soc. Vol. 28, p. 349 [1902] (Euthy- "Western United States. 
newra); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 263 [1903] 
(Microphorus). 
2. T. basalis, nov. sp. (1). California. 
(1) Trichina basalis, nov. sp. — Male. Length 2 mm. Black, subopaque, completely coated with pollen 
which is brown on the thorax and gray on the abdomen. Upper facets large, antenna inserted below the middle of 
the head, face relatively broad and excised midway to the antennz ; proboscis very short; antennz with the third 
joint compressed conical, twice aslong as wide and twice as long as the style ; ocellar hairs short. Two posthumeral, 
three notopleural, eight scutellar, nine dorsocentral and four small supraalar bristles, a median double row of five 
