MUSCIN 2. 
Group MUSCINZ. 
In the Muscine, as in the preceding groups, the tegule are large and well developed, 
and the terminal portion of the fourth vein is curved upwards, thus forming an apical 
cross-vein. 
This last-mentioned character, however, becomes less conspicuous in certain 
genera, and these form a transition to the following group (Anthomyine), in which the 
fourth vein runs in a straight line to the tip of the wing. 
For the rest, the Muscine 
usually have the arista plumose over its whole length, and the abdomen short ovate 
and without macrocheetee, or if these are present they are feebly developed. 
Some of the commoner species of this group are cosmopolitan. 
In the Central-American collections which I have examined the following genera of 
Muscine are represented :— 
1. 
Proboscis long, porrect, pointed towards the tip; arista plumose 
on the upperside only . . . 
Proboscis short, with well- developed terminal lips ; 
usually plumose on the upper and under sides * 
arista 
. Curvature of the fourth vein angular . 
Curvature of the fourth vein rounded or arcuate . 
Eyes plumose oe 
Eyes bare. . . . - « . Lee ee 
. Middle tibie without bristles on the i inner side (blackish species, 
with the abdomen sometimes more or less yellow, but always 
with a total absence of metallic coloration) . 
Middle tibize with one or more bristles on the inner side (species 
often with a metallic coloration on the abdomen or other 
parts on the body) 
Thoracic dorsum usually blackish . . . . oe ee 
Thorax, scutellum, and abdomen brightly metallic . 
Dorso-central bristles distinct; usually some shorter bristles 
above the vibrissz . oe . 8 oo 
Dorso-central bristles absent ; no bristles above the vibrisse . 
. Thoracic dorsum with rather distinct black and whitish longi- 
tudinal stripes . we ees . oe 
Thorax unicolorous, metallic, at most with some whitish 
tomentum on the anterior portion 
. Wholly metallic species . . . . . : 
Black, grey, or rufous species, sometimes with the abdomen, 
except at the base, metallic 
. Apical cross-vein distinct, longer than the terminal portion of 
the fourth vein before its curvature; apical cell opened a 
little before the tip of the wing . 
Stomoxys, Geoftir. 
mw n 
Tyreomma, v. d. Wulp. 
4, 
Musca, Li. 
7. 
Calliphora, Rob.-Desv. 
Chloroprocta, v. d. Wulp. 
Compsomyia, Rond. *) © 
Lucilia, Rob.-Desv. — 
Pyrellia, Rob.-Desv. 
9. 
10. 
* Except in Hemichlora vittigera, Big., 
in which the arista is plumose on the upperside only, 
2p 2 
