NO. 2173. A REVISION OF THE BEMBICINE WASPS— PARKER. 65 



This species was described by Provancher from a single specimen 

 from California, and in view of the fact that this specimen was a 

 female the following statement by Fox mth regard to this species is 

 not clear : ^ 



The maculation of this species is a much richer yellow than in ventralis, and the 

 female, which has been heretofore unnoticed, is very much like the male and has a 

 well developed pygidium. 



As a matter of fact, the female has no pygidial area whatever and 

 up to the time Fox published his Synopsis the male had not been 

 described. The first account of the male is found in Rohwer's 

 description of B. meliloti, which I consider identical with the male of 

 yarata, since it differs not at all from the latter in structure or in 

 color pattern and since the series before me shows a well-marked 

 gradation from the bright yellow at one extreme to the greenish white 

 of meliloti at the other. 



Habitat. — California, Washington, Arizona, and Utah. 



Number of specimens — Males, 9; females, 6. 



BICYRTIS QUADEIFASCIATA Say. 

 Figs. 117, 118. 



Monedula quudri/cmiata Say, Expd. St. Peters River, vol. 2, 1824, p. 336, male, 



female. 

 Monedula sallei Guerin, Icon, du Regne Anim., vol. 7, Insect, 1845, p. 437. 

 Bembidula quadrifasciata Handlirsch, Sitz. Akad. Wissnsch. Wien, Math.-Nat. 



CI., vol. 98, 1889, p. 492. 

 Bembidula variegata Fox, Proc. Acad. Nat. Sci. Phila., 1895, p. 353. 



Male. — Black: Scape below, apical border of clypeus variable in 

 extent, medial stripe on labrum variable in width or sometimes want- 

 ing, spot on base of mandible, broad anterior orbits abbreviated 

 above, narrow posterior orbits, posterior margin of pronotum, spot on 

 side of prothorax, tubercles, pair of small rounded lateral spots on 

 scutellum, lateral angles of median segment, fasciae on tergites 1-5 

 interrupted and attenuated medially, those on 4 and 5 shortened lat- 

 erally, frequently lateral spots on 6, small lateral spots on sternites 

 2-5, small spot on anterior coxa below, distal ends of femora below 

 most extensive on anterior pair, tibiae except stripe on posterior pair 

 above, tarsi except tips of segments on second and third pairs, which 

 are more or less dusky, yellovj. Wings slightly infumated; legs with- 

 out special structures. 



Female. — Black: Scape below, clypeus except spot of variable size 

 at base, labiTun except sometimes the lateral borders, spot on base 

 of mandible, broad anterior orbits abbreviated above, narrow poste- 

 rior orbits, posterior margm of pronotum, spot on side of prothorax, 

 tubercles, narrow lateral line on extreme sides of scutum, frequently 



1 Synopsis of Bembicini of Boreal America, Proc. Acad. Nat. Sci. Pliila., 1895, p. 353. 

 65008°— Proc.N.M.vol.52— 17 5 



