172 PROCEEDINGS OF THE NATIONAL MUSEUM vol.73 



extended in two points on its posterior surface; posterior lateral 

 angles broadly and vertical anterior line on side of propodeum; 

 metapleura; very large spot on mesopleura enclosing black spot 

 below and prolonged on mesosternum ; broad, continuous fasciae on 

 tergites 1-6, those on tergites 2 and 3 narrower on the disk than on 

 the sides of the tergites and notched at dorsal midline; apex of 

 seventh broadly; sternites, except median longitudinal spot on sec- 

 ond and basal border more or less on others ; legs, except black spots 

 on coxae and trochanters and dark line below on middle and 

 posterior femora. The labrum and the tarsi are yellow; the tibiae 

 are largely yellow; the fasciae on the tergites are a combination of 

 yellow and ferruginous; elsewhere the maculations are either fer- 

 ruginous or a fusion of yellow and ferruginous. 



The antenna is relatively heavy and stout, but aside from color it 

 presents no specific characters. The tegula, the base of the wings 

 and the veins are ferruginous in color and the infumation of the 

 wings is slight and uniform. The second sternite bears a well- 

 developed median, rounded, bluntly-pointed process situated about 

 midway between the basal and apical borders of the sternite. The 

 pubescence on head and thorax is white and short and on the clypeus 

 and lower part of the frons it is silvery. On the abdomen the 

 pubescence has a golden luster and on the seventh sternite it is 

 unusually long and abundant. 



Length 18 mm. Described from a single male bearing the No. 

 3782 and the label, "America Merid." 



Type. — In the Zoologisches Museum der Universitat, Berlin. 



BICYRTES VIDUATA (Handlirsch) 



Figure 47 



Bembid/ula viduata Handlibsh, Sitz. Akad. Wissensch. Wlen, Math.-Nat. CI., 



vol. 98, 1889, p. 491.— Dalla Torre, Cat. Hym., vol. 8, 1897, p. 496. 

 Bivyrtes viduata Parker, Proc. U. S. Nat. Mus., vol. 52, 1917, p. 69. 



This species may be distinguished, both males and females, from 

 all others, except gracilis, by the presence of the heavily infumated 

 area (including the first cubital cejl) on the anterior wing. It is 

 distinguished from gracilis by its more extensive maculations and 

 by the character of the male genitalia. 



I have before me of this species eight males and four females, 

 collected by Mitchell and Cushman at Chisos Mountain, Brewster 

 County, Tex., June 10-12, 1908. I have also a female collected by 

 C. F. Baker, labelled " Mexico," and a male that bears the label " San 

 Rafael, Jicoltepec." The localities from which were collected the 



