iw) 
Lo 
DIPTERA. 
testaceous. Wings greyish-brown, at the base and the beginning of the costa testaceous ; small cross-vein 
placed a little before the middle of the discal cell; apical and posterior cross-veins curved. Length 
11 millim. 
Several examples of both sexes.: 
It seems that there exist in North America still more species, which show, like the 
two foregoing, a yellow or white marking on the black abdomen. Williston has 
described such a species (from New Mexico) under the name of Saundersia maculata 
(Trans. Amer. Ent. Soc. xiii. p. 304): according to his description it differs from 
S. macula, Macq., only in its greater size (14 millim.) and in the red scutellum. 
Another species is rather doubtfully identified by Williston (d. ¢. p. 303) with Tachina 
signifera, Walk. (List Dipt. Brit. Mus. iv. p. 708), and included by him in the genus 
Saundersia) ; it is characterized by the black coloration of the base of the femora. 
With respect to this identification, however, I am very dubious, for Walker’s description 
contains the words “palpi tawny,’ whilst in the other species of this group the 
palpi are totally absent. I suppose that Zachina signifera, Walk., belongs either to 
the genus Hystricia or to Jurinia, in which similarly-coloured and marked species 
occur, as, for example, Hystricia plagiata, Schiner (Reise d. Novara, Zool. iii., Dipt. 
p. 332). 
5. Saundersia rufopilosa, sp.n. g¢ ¢. (Tab. I. fig. 18.) 
Antenne black, with the basal joints dark rufous; thorax cinereous; scutellum and abdomen rufous, the latter 
with large black dorsal spots, a dense fulvous pilosity, and black spines; legs fulvous; wings brownish. 
Length 12-14 millim. 
Head pale ochraceous ; face a little retreating, but prominent again near the oral margin; above the vibrisse 
three and beneath several shorter bristles ; cheeks with weak hairs; front narrowed behind, especially in 
the male, with a yellowish-brown tomentum, black pile, and a reddish-brown median band; frontal 
bristles rather weak, several placed close together near the base of the antenne; in the female the frontal 
bristles less numerous but more robust; beard pale yellow; pilosity of the occiput cinereous. Basal 
joints of the antenne brownish-rufous, the second joint bristly on the upper part; third joint black, a 
little longer than the second, convex on the front side, rounded at the apex; arista rather distinctly 
jointed, gradually tapering towards the end and microscopically pubescent. Proboscis shining black. 
Thorax yellowish-cinereous, with indistinct longitudinal stripes; pilosity fulvous, in some Specimens more 
obscure ; macrochete abundant and long. Scutellum rufous, with two rows of spines; the hind margin 
with four long macrochetex, reaching over the first two abdominal segments. Abdomen ferruginous, with 
large black dorsal spots, which are sometimes joined together and thus form a broad longitudinal band; 
in a few specimens the middle portion of the venter, near the anus, is shining black; the abdomen itself 
is clothed with a dense rufous or fulvous pilosity, between which the black spines are very distinct—these 
are most abundant on the upper part of the second and third segments, and at the hind margin of the 
latter they form a continuous row; on the fourth segment there are only a few spines between the rufous 
pilosity ; laterally on the first segment are two spines. Legs fulvous; on the coxee and at the underside 
of the femora are some partly yellow and partly black bristles ; front tibize outwardly along their whole 
length with short black bristles; posterior tibisze with longer and stouter bristles ; foot-claws and pulvilli 
yellow (the claws with black tips), in the male elongated and surrounded by black hairs ; front tarsi in 
the female a little dilated. Tegule testaceous. Wings brownish, with the base and the beginning of the 
costal region rufous; small cross-vein placed before the middle of the discal cell; apical and posterior, 
cross-velns curved, 
