from the Rio Nautla, State of Vera Cruz. 25 
2. The second basal cell mostly filled with the 
BIER vevsauicte Sie sv Aiea Stake so os oR Gs meridionalis, Towns. 
(Vera Cruz, Tehuantepec, Brazil.) 
The second basal cell almost wholly hyaline .. geminata, sp. n. 
(Texas lowlands.) 
27. Nausigaster geminata, sp. n. 
Twenty-seven specimens, male and female, Beeville and 
Kenedy, Texas. All taken on flowers of Parthenium hystero- 
pherus, L. (det. Wooton), August 30 to Sept. 14. 
Length 5 to 6 millim. (rarely 7 millim., female), the male 
being the smaller. 
Differs from Williston’s description of punctulata, female 
(Syn. pp. 21-22), as follows :—On mesonotum there are four 
distinct less pollinose stripes. There is also the beginning of 
a narrower one just above base of wings. The two median 
ones are narrowly separated, and sometimes appear as one 
owing to the effacing of the pollinose line which normally 
separates them. Lower part of face same colour as antennz 
(yellowish red), only a shade or two lighter. The two black 
spots of wing are united, filling all of submarginal cell except 
distal end. ‘There is also a blackish cloud on the cross-veins 
at distal end of second basal cell, and a slightly yellowish 
infuscation in first and second costal cells and base of marginal 
cell. Legs are yellowish red; femora as in punctulata ; tarsi 
all more or less brownish, especially hind pair. Scutellum in 
both sexes, and abdomen in male, more or less tinged with 
yellowish red (fresh specimens). 
Described from 20 males and 7 females, as follows :— 
Beeville, Texas, 1 male and 1 female, Aug. 30; 3 males and 
2 females, Aug. 31: Kenedy, Texas, 1 female, Sept. 11; 
and 16 males and 3 females, Sept. 14. These numerous 
specimens are all constant in the wing picture, with the 
single exception of the female taken Sept. 11, in which the 
two spots are very faintly but still perceptibly united. The 
second basal cell in all shows a tendency toward a very slight 
fuscous-yellow tinge, but is not enough to appreciably affect 
its hyaline appearance when held up to the light. Only two 
of the specimens (both females) measure 7 millim., the others 
all being from 5 to 6 millim. This species differs from 
meridionalis not only in the less extensive picture of the 
wings, but in the smaller size, the very distinct thoracic 
vitte, &e. 
Volucellas of the amethystina Group. 
There are six species of Volucella, taken on the flowers of 
the Cordia sp. at San Rafael, which by their general metallic 
