HYSTRICIA. 15 
6. Hystricia soror. (Tab. I. fig. 9.) 
Hystricia soror, Williston, Trans. Am. Ent. Soc. xiii. p. 297 (1886) ’. 
Hab. Norta America, Arizona’.—GvuatemaLa, San Gerdénimo (Champion); Costa 
Rica, Cache (Rogers). 
A male and five female specimens. These measure from 10-11:5 millim. in length ; 
but one of the females (from Guatemala) is much larger than the others (15 millim.), 
though not differing in other respects. 
To the description of Williston 1 (made from a single female example) I may add :— 
The face is but very little inclined and hardly prominent at the oral margin. ‘The 
scutellum is not quite dark red (as it is called by Williston), but more of a piceous- 
brown colour. The faintly reddish colour of the tibiz is in all our specimens confined 
to the extreme base;. the foot-claws are wholly black; the tegule blackish. The 
wings have a grey tint and are blackish at the base; the small cross-vein is placed 
before the middle of the discal cell; the two exterior cross-veins are slightly curved ; 
the apical cell is somewhat drawn out in a point at its lower end. 
7. Hystricia velutina, sp.n. ¢. (Tab. I. fig. 10.) 
Thorax cinereous, with four distinct black stripes; scutellum rufous-brown ; abdomen velvety-black, with 
whitish hind borders to the segments; basal joints of the antenna, palpi, and legs fulvous; tegule and 
wings dark brown. 
Length 17-5 millim. 
Face scarcely inclined, not prominent at the oral margin, in the middle whitish; cheeks bare; a row of 
staaller bristles above the vibriss# ; beard yellow. Front much narrowed behind, yellowish-cinereous, 
with a black median band; frontal bristles abundant, but not very strong, descending as far as the end 
of the second antennal joint. Eyes densely clothed with yellowish pile. Occiput with yellow hairs ; 
above, behind the eyes, with long black bristles. Antenne black, the two basal joints rufous, the 
second beset with several black bristles ; the third joint twice as long as the second; arista thickened 
to half its length. Proboscis and palpi fulvous, the latter rather stout and with short black bristles. 
Thorax dark cinereous, with four very distinct broad longitudinal black stripes (which are continued 
behind the transverse suture); pilosity black, the bristles rather weak. Scutellum reddish-brown, with 
strong bristles, those of the hind border spine-like ; metanotum grey. Abdomen velvety-black, the sides 
of the second and third segments brownish ; on the front side of the second and following segments is a 
narrow whitish-grey (somewhat silvery) border, which at the middle of each is extended to a small trian- 
gular spot; pilosity black and rather long (the spine-like macrochete, on the contrary, weaker and less 
numerous than in the preceding species, though more abundant near the anus). Legs fulvous, almost 
orange-yellow ; coxe and femora more obscure, in consequence of their short black pilosity ; on the front 
side of the first pair of coxe is a clear yellow reflection; tibiae and tarsi with yellow pile; the black 
bristles of the legs scarce and rather weak; the curved bristles round the terminal joint of the tarsi 
yellow ; the pulvilli and claws also yellow, the latter with black tips. Tegule blackish-brown, with a 
yellowish margin. Wings dark brown, narrowed towards the apex; small cross-vein placed distinctly 
before the middle of the discal cell; apical cross-vein incurved near its base and running obliquely 
onwards in a straight line towards the costa; posterior cross-vein oblique, slightly undulate. 
Hab. Costa Rica, Rio Sucio (Rogers). 
A single male. 
