TACHININ. 41 
Since the publication of the first part of this volume, I have received from the 
editors new collections, containing a large number of species which were not repre- 
sented in the preceding. Moreover, Professor Bellardi of Turin has been kind enough 
to send me the Mexican Tachinine in his possession. The examination of all these 
collections has enabled me to add several new species to the genera already treated : 
they will be published afterwards in a Supplement. There are also many species which 
must be included in genera not hitherto known as belonging to the Central-American 
fauna, or which require new genera for their reception. It is therefore necessary to 
give here a revision of the Synoptical Table published on pp. 5-7; the portion appearing 
on p. 5, referring to the first six genera, does not, however, require any alteration. 
Synoptic Table of the genera of Tachinine belonging to the Central-American fauna *. 
Third joint of the antenne as long as or longer than the 
second. . ..... . . . 7. 
7. First posterior (apical) cell ending distinctly before the apex 
ofthe wing . . 2... 1 1 ee eee ee we 8B 
First posterior (apical) cell ending at or very near the apex 
of the wing, or closed and sometimes petiolated . . . . 28. 
8. Palpi rudimentary or absent . . . . 2... 2 ew ee OD 
Palpi fully developed. . . . . . «. - .. . Ld. + | 
9. Eyes hairy ; fourth vein prolonged at its point of curvature . Micropalpus, Macq. oe 
Eyes bare; fourth vein not prolonged at its point of curvature 10. - AT 6 
10. Cheeks with one or more bristles. . . . . . . . . . Trichophora, Macq. a) 
Cheeks without bristles. . . . 2. 2. 2. 2. 1 « - « « Gymnomma, v. d. Wulp. 48 
ll. Arista distinctly jomtedt . . . 2... . 12. 
Arista not jointed, or, at most, with a scarcely visible joint: at 
the extreme base . . . .. . . an 16. 
12. Antenne short and broad; third joint as long as s the second, 
or but little longer (facies Echinomyia-like) . . . . . Nemochata,v.d. Wulp. 7. °% 
Antenne slender and mostly long; third joint two to four ve 
times as long as the second (facies not Echinomyia-like) . 138. 
13. Head, and especially the front, very swollen; frontal bristles 
weak, but numerous and irregularly spread ; arista distinctly . 
nicked. ©. 1 ee ee eee ee ee wee Gonia, Meig. 7% | 
* Except the genera in which the scutellum and abdomen are spinose; and the genus Echinomyia, in 
which the third antennal joint is shorter than the second (Nos. 1-6 of the former Synoptic Table). 
+ Some species of Nemorea have the arista not distinctly jointed; and these having hairy eyes, like the 
others of the genus, apparently come under the numbers 17-20. I therefore note here, that they may be 
distinguished from Gymnochia by their coloration, which is not metallic green or blue ; from Mystacella and 
Meigenia by having the vibrisse less removed from the oral margin; from Exorista by the shorter antenne 
(the third joint not more than twice as long as the second); and from Phorocera by the absence of bristles on 
the facial ridges. 
BIOL. CENTR.-AMER., Dipt., Vol. II., January 1890. g 
