446 SUPPLEMENT. 
1. Cistogaster ruficornis. 
Cistogaster ruficornis, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 186 - 
Thorax anteriorly testaceous, with four brown stripes, posteriorly black; abdomen rufous, with black dorsal 
spots; antenne rufous ; legs black. 
Length 5:5 millim. 
Face and cheeks pale yellow ; front ochraceous ; frontal band rather broad, testaceous; ocellar triangle black. 
Antenne, including the arista, rufous; second joint somewhat elongate, with short bristles; third joint a 
little longer than the second. Proboscis shining black; palpi rufous. Thorax before the transverse 
suture testaceous, with four brown stripes, the shoulders bright ochraceous ; behind the suture the thorax 
is black and bears a short black pile; scutellum black. Abdomen rufous, the base and three irregular 
dorsal spots black. Legs black; foot-claws and pulvilli fuscous. Tegule yellow. Wings brownish- 
grey, the base yellow; apical cross-vein oblique, straight ; posterior cross-vein a little curved; petiole of 
the apical cell slightly bent upwards. 
Hab. Mextco1, Teapa in Tabasco (H. H. Smith). 
A single male specimen. A female from Puebla in the collection of the late 
Prof. Bellardi, in Turin, seems to belong to this species ; it has the dorsal spots of the 
abdomen more extended, forming on the first three segments a broad band, which is 
somewhat dilated on each of them posteriorly, and the anal spot double. [According 
to Mr. Townsend (Canad. Ent. 1893, p. 166), C. ruficornis is perhaps synonymous with 
Gymnosoma filiola, Low. | 
2. Cistogaster melanosoma. 
Cistogaster melanosoma, v. d. Wulp, Tijdschr. voor Ent. xxxv. p. 186’. 
Black; head whitish ; shoulders, pleure, and last abdominal segment grey. 
Length 6 millim. 
Front as broad as the eyes, narrowed towards the vertex; frontal band black; face, cheeks, and sides of the 
front white, with grey reflections; oral margin prominent; beard white. Antenne black; third joint 
one and a half times as long as the second. Proboscis and palpi black, the latter small, slightly thickened 
at the tip. Thorax and scutellum black ; shoulders, pleure, and thoracic dorsum before the transverse 
suture grey, the latter with traces of black stripes. Abdomen shining black ; anal segment grey, especially 
at the sides and along a dorsal stripe. Legs black ; foot-claws and pulvilli short. Tegule white. Wings 
greyish-hyaline ; small cross-vein before the middle of the discal cell; apical cross-vein straight ; posterior 
cross-vein a little curved ; petiole of the apical cell slightly bent upwards. 
Hab. Mexico!, Chilpancingo and Xucumanatlan in Guerrero (fH. H. Smith). 
Two female specimens. [Mr. Townsend (Canad. Ent. 1893, p. 166; Ann. & Mag. 
Nat. Hist. (6) xx. p. 284) thinks that this species is probably synonymous with 
C. pallasi, Towns., from 8. Dakota. ] 
3. Cistogaster subpetiolata. 
Cistogaster subpetiolata, vy. d. Wulp, Tijdschr. voor Ent. xxxv. p. 186°. 
Grey ; frontal band, stripes on the thorax, first and second abdominal segments and some spots on the following 
segments, antenne, and legs black; apical cell closed nearly at the wing’s margin. 
Length 3°5 millim. 
Head white; front grey, of equal breadth over its whole length ; frontal band black, narrower than the sides, 
