DIPTERA. AAT 
bifid before the vertical triangle; cheeks inferiorly with a brownish-yellow margin ; beard white; occiput 
grey. Antenne black; third joint as long as the second, whitish at the base on the inner side, Proboscis 
black; palpi brown. Thoracic dorsum with two broad blackish stripes, each of which (when viewed in 
some directions) seems to be composed of three lines ; pleure whitish-grey; scutellum greyish-black. First 
abdominal segment wholly black; second segment black, with a grey dorsal stripe and less distinct grey 
lateral spots ; third segment grey, with two large black spots on the hind margin, the space between these 
spots forming the continuation of the dorsal stripe on the preceding segment ; anal segment grey, with 
two lateral black spots. Tegule white. Wings greyish ; apical and posterior cross-veins oblique and 
nearly straight ; apical cell ending in the wing’s tip and with a very short petiole. 
Hab. Mexico !, Atoyac in Vera Cruz (7. H. Smith). 
A single female specimen. [Mr. Townsend states (Canad. Ent. 1893, p. 166) that 
C. subpetiolata seems to be only a variety of his C. pallasi ; and subsequently (Ann. & 
Mag. Nat. Hist. (6) xx. p. 284) that it is a small specimen of C. occidua, Walk. ] 
4. Cistogaster propinqua. 
Cistogaster propinqua, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 187°. 
Thorax grey, with black stripes; abdomen yellowish-rufous, with brown markings; antenne partly black, 
partly rufous ; legs black ; apical cell closed nearly at the wing’s margin, 
Length 6 millim. 
Front a little narrower than the eyes, yellowish-white ; frontal band black; face and cheeks whitish ; oral 
margin slightly prominent ; occiput grey ; beard white. Basal joints of the antenne black ; third joint 
nearly twice as long as the second, rufous, but on the fore side black. Proboscis black, the base brownish ; 
palpi rufous, thickened towards the tip. Thorax greyish-cinereous, with some black stripes, the two 
median stripes linear and distant from each other; scutellum obscure cinereous. Abdomen yellowish- 
rufous ; in one of the specimens the first segment is brown, the two following segments have a brown 
hind-border, which in the middle is interrupted, and the anal segment has two brown spots ; in the other 
specimen these brown markings are less obscure, having a more rufous tint, and are totally wanting on 
the anal segment. Legs black; foot-claws and pulvilli very short. Tegule white. Wings greyish- 
hyaline, yellowish at the base and the beginning of the costa; small cross-vein on the middle of the discal 
cell ; posterior cross-vein slightly curved ; curvature of the fourth vein with a somewhat rounded angle ; 
petiole of the apical cell very short, inconspicuous. 
Hab. Mexico}, Tepetlapa in Guerrero (£7. H. Smith). 
Two females. [According to Mr. Townsend (Canad. Ent. 1893, p. 166), this species 
seems very near C. tmmaculata, Macq. | 
5. Cistogaster griseonigra. 
_ Cistogaster griseonigra, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 187°. 
Grey; frontal band, thoracic dorsum, the abdomen in part, antenns (except the rufous base of the third joint), 
and legs black ; palpi rufous. 
~ Length 4°5-6 millim. 
Head whitish ; front narrower than the eyes ; face slightly prominent towards the oral margin; beard white. 
Antenne black ; third joint one and a half times as long as the second, rufous at the base. Proboscis 
black; palpi pale rufous, almost filiform. Thorax and scutellum greyish-cinereous; thoracic dorsum 
black, before the transverse suture less obscure and with indistinct black stripes. Abdomen with the first 
two segments shining black (in certain specimens the hind-border of the first is more or less rufous, this 
colour sometimes extending on to the sides of the two following segments) ; third segment grey, with the 
hind-border shining black, but in the middle interrupted by a grey dorsal stripe ; fourth segment grey, 
3m 2 
