130 PROCEEDINGS OF THE NATIONAL, MUSEUM vol.75 



black abdomen and bright yellow fasciae confined to tergites 2-4, can 

 scarcely be confused with any other American species. Except on 

 the tergites, the maculations are pale. The fasciae on the tergites 

 are usually all interrupted, but on some specimens that on the first 

 tergite or those on the first and second are continuous. On one male 

 there are small, yellow spots on the fifth tergite. The antenna is 

 without structural modifications. The anterior metatarsus bears 

 seven spines. The middle femora are smooth. The second sternite, 

 although sometimes slightly carinate, is without a process; the sixth 

 bears a small, median process that on some specimens is obsolete. 

 The seventh is distinctly carinate on the midline. 



The female appears under two forms: one has the fasciae on the 

 tergites, the lateral spots on the sternites, and to a greater or less 

 extent the legs also, bright yellow ; while the other has the macula- 

 tions on all parts of the body pale. With respect to the pattern of 

 the maculations there is no essential difference between the two forms. 

 Data derived from the specimens before me show that males and both 

 forms of the female have been taken at the same place on the same 

 date. The species seems to be confined to Chile. 



SPECIMENS EXAMINED 



Chile: Angol (1924, Det. Rohwer) ; Merimar (February, 1921) ; Santiago 

 (February, 1921, A. Faz ; 1923, Fr. Claude Joseph, Det. Herbst) ; Southern 

 Part (M. J. Revera). 



BEMBIX PRIUNOSA Fox 



Betnbex pruinosa Fox, Proc. Acad. Nat. Sci. Phila., 1895, p. 361. 

 liembix pruinosa Parker, Proc. U. S. Nat. Mus., vol. 52, 1917, p. 104. 



This is a well-marked species, one not likely to be confused with 

 any other species thus far described from North America. On both 

 sexes the maculations are white and relatively broad. The smooth 

 middle femora, the absence of processes on the second and sixth 

 sternites, and the reduction of the seventh sternite to a spine grooved 

 on its ventral surface form a combination of characters that dis- 

 tinguish the male of this species. The female is distinguished by a 

 black basal area on the clypeus (rarely obsolete) ; by fasciae (some- 

 times broken) on scutellum, metanotum and propodeum; and by the 

 lack of any tendency in the fascia on the second tergite to inclose 

 a pair of black spots. 



SPECIMENS EXAMINED 



California: Mount Sha.sta Di.strict. 



Canada: (C. F. Baker). 



Floeida. 



Iowa: Dubuque (August 25, 1872) ; Muscatine (August 8, 1889, Witter). 



Kansas: Riley County (September, Marlatt). 



