eh) 
TYREOMMA.—MUSCA. 29 
TYREOMMA, gen. nov.* 
Eyes distinctly pilose. Head as broad as the thorax; front and cheeks broad, the inferior portion of the 
latter equalling more than half the longitudinal diameter of the eyes; face slightly concave, not carinated 
in the middle ; frontal bristles descending to the root of the antennex ; three orbital bristles ( 2 ); vibrissz 
inserted close to the oral margin ; some short bristles above and several others behind them. Antenne 
inserted beneath the median line of the eyes; third joint two or three times as long as the second ; arista 
moderately plumose, but not quite to the tip. Proboscis short, with distinct terminal lips ; palpi slightly 
thicker towards the tip. Thorax with distinct dorso-central bristles. Abdomen broadly ovate, as long 
as the thorax; the third and anal segments with marginal macrochete only, the second segment with 
lateral macrochete also. Legs proportionately short; hind tibie fringed outwardly. Tegule large. 
Wings longer than the abdomen; apical cell opened a little before the tip of the wing; curvature of the 
fourth vein rectangular, but without appendage; posterior cross-vein beyond the middle between ihe 
small cross-vein and the curvature of the fourth vein. 
In its general habitus (the broad form and short legs) this genus agrees with the 
group Muscine; the somewhat developed macrochete on the abdomen, and the 
plumosity of the arista, which does not reach quite to the tip, indicate, however, some 
relation with the Sarcophagine. 
1. Tyreomma muscinum, sp.n.,9. (Tab. VIL. figg. 13, 2 ; 13a, head in profile.) 
Grey; thoracic stripes, hind borders of the abdominal segments, third antennal joint, and legs black; palpi 
and basal joints of the antenne rufous. 
Length 9 millim. 
Head whitish-grey ; cheeks and oral margin with rufous-brown reflections; front (9 ) broader than the eyes ; 
frontal band blackish ; frontal bristles short, but numerous. Eyes densely beset with a yellowish pile. 
Antenne shorter than the face; the two basal joints and the base of the third rufous. Palpi rufous. 
Thorax grey, with a median and two lateral stripes black; the median stripe extends over the whole 
length of the thorax, and is anteriorly flanked by two black lines, which are convergent in front; 
the lateral stripes are interrupted at the transverse suture, the anterior portion being small and of elon- 
gate-trigonal shape. Scutellum grey. Abdomen convex, broader than the thorax ; first segment entirely 
black ; the second segment black, with a grey front-border, which in the middle is enlarged and shows a 
black dorsal line; third segment with a whitish-grey front-border; anal segment grey, with blackish 
reflections; third segment with two marginal macrochete; anal segment with several macrochete. 
Legs black; front femora with a row of bristles on the upper and under sides; middle tibie with two 
bristles on the outer side; hind tibis fringed on the outer side with bristly hairs, and also with two 
longer bristles ; foot-claws and pulvilli very short. Tegul yellowish-grey. Wings greyish; small cross- 
vein on the middle of the discal cell ; apical cross-vein concave ; posterior cross-vein distinctly curved. 
Hab. Mexico, Omilteme in Guerrero 8000 feet (HZ. H. Smith). 
A single female specimen. 
MUSCA. 
Musca, Linneus, Faun. Suec. p. 439 (1763). 
1. Musca domestica. 
Musca domestica, Linn. Faun. Suec. p. 453’; Fabr. Syst. Antl. p. 287°; Meig. Syst. Beschr. v. 
p. 67. 31°; Schiner, Faun. Austr., Dipt. i. p. 594°; id. Reise der Novara, Dipt. p. 806°; 
van der Wulp, Dipt. Sumatra-Exped. p. 43°; id. Tijdschr. voor Ent. xxvi. p. 38"; v. Réder, 
* znpéw (to protect) ; dupa (eye). 
