■1S(U.] 27 



I have not seen any specimens which answei' to the above descrip- 

 tion. I 



1 5. 0. purpurea, n. sp. 



Female. — Head rather large, as wide as the thorax, dark purple, 

 densely and finely punctured, thinly clothed with yellowish-white pu- 

 bescence, which is longer on the sides of the face and cheeks, and 

 short and sparse on the clypeus ; anterior margin of the clypeus entire 

 and fringed beneath with fulvous pubescence, the mandibles also clothed 

 with short fulvous pubescence ; antennae short and black. Thorax 

 dark purple, finely and densely punctured, clothed with yellowish- 

 white pubescence which is paler beneath ; tegulfe black, smooth and 

 shining. Wings subhyaline, apical margin faintly clouded. Legs black, 

 with short pale pubescence, tarsi beneath with fulvous pubescence. 

 Abdomen subglobose, dark purple, slightly tinged with blue, densely, 

 rather finely and confluently punctured, clothed with short, suberect, 

 pale yellowish pubescence ; on the basal segment and on the sides, the 

 pubescence is rather long and whitish; the posterior margins of the 

 second and three following segments are fringed with whitish pubes- 

 cence, sometimes interrupted on the middle of the second and third 

 segments; on the apical segment the pubescence is short, dense and 

 whitish; beneath, the ventral scopa is rather dense and black. Length 

 82 — iij lines. 



Hah. — Conn., Penn., N. Jersey. Five 9 specimens. Coll. Entom. 

 Soc. Philad.. and Mr. Edward Norton. 



The dark purple color and the narrow whitish fasciae of the abdo- 

 men of this species, will readily distinguish it from all others known 

 to me. The whitish apical fringe of the abdominal segments are very 

 conspicuous when held in certain lights, and also on the apex of the 

 abdomen where the segments are more retracted. 



The specimens before me of this species were labelled 0. bucconis 

 Say, but in that species the color is said to be "black," and the ven- 

 tral scopa "fulvous"; but in the species before me the general color 

 of the body is conspicuously dark purple, and the ventral scopa is 

 black. 



l(:i. 0. sericea. n. sp. 



Male. — Head black with a slight blue-green reflection, densely and 



