from iJte Bio Xaiitla, State of Vera Cruz. 25 



2. The second basal cell mostly filled with the 



picture nicridionalis, Towns. 



(Vera Cruz, Tohuantepec, Brazil.) 

 The second basal ceU almost wholly hyaline . . gemimUa, sp. n. 



(Texas lowlands.) 



27. Nausigaster geminata, sp. n. 



Twenty-.sevea specimens, male and female, Beeville and 

 Kenedy, Texas. All taken on Wowevri oi Farthenium hystero- 

 ]>/ierus, L. (det. Wooton), August 30 to Sept. 14. 



Length 5 to 6 millim. (rarely 7 milllra., 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 ap])ear as one 

 owing to the effacing of the pollinose line which normally 

 separates them. Lower part of face same colour as antennas 

 (yellowish red), only a shade or two lighter. The two black 

 spots of wing are united, filling all of submarglnal cell except 

 distal end. There is also a blackish cloud on tlie 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 pimctulata ; tarsi 

 all more or less brownish, especially hind pair. Scutellura 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 

 vitt£e, &c. 



Volucellas of the amethystina Group. 



There are six species of Volucella^ taken on the flowers of 

 the Cordia sp. at San Kafael, which by their general metallic 



