43 



along the fovea; fovea at most : ocellocular line : : 12 : 13; foveal band wanting; 

 distance between fovea and ocelli : ocellocular line : : 3 : 13 ; fovea attenuated 

 below its middle where it is apparently only one-half or a little more than 

 half as wide as the greatest width of the fovea, the latter continued to a 

 point apparently on the clypeal line; fovea filled with pale-ochreous hairs; 

 hairs of vertex and temples concolorous with those of the face, face 

 mostly polished, partly indistinctly reticulate, with distinct punctures that 

 are mostly adjoining or nearly so and at most three puncture-widths apart; 

 clypeus slightly elevated above the apical margin, convex, sculptured like 

 the face except that the punctures are larger; clypearea present and well 

 defined though narrow; clypeus thinly hairy, its sculpture not at all hidden 

 by hairs; labrarea truncate, its width at base : length down the middle : : 9 : 4; 

 width at apex : length down the middle : : 4 : 4; labrum with a fringe of 

 golden hairs, labrum without a median longitudinal crista between the labrarea 

 and apical edge of labrum; joint 3 of antennae : 4 + 5 : : 7 : 8; joints 4 and 5 

 thicker than long, the succeeding joints as thick as long or little longer than 

 thick except joint 12 which is distinctly longer than thick; antennae blackish 

 throughout; mandibles atypical, robust, extending to the outer edge of the 

 labrarea, black except for the apical fourth and inner edge which are at least 

 partly clear dark reddish ; palpi nearly typical ; thorax covered with an abund- 

 ance of pale-ochreous almost white hairs which are shorter on the dorsulum 

 than on the mesopleurae; dorsulum dullish, finely reticulated and more 

 distinctly punctured than the face; notauli represented by an impressed 

 shining line; mesopleurae with whitish hairs, appearing rugulose, its punctures 

 adjoining; scutel hairy, polished but punctured much like the dorsulum; 

 metanotum with whitish hairs sculptured differently from the rest of the 

 thorax, densely punctured; tegulae brownish stramineous, polished; wing- 

 base partly dark brown; subcosta blackish brown, stigma dark brownish 

 stramineous, rest of veins not as dark as the stigma, membrane with a uniform 

 brownish tinge; legs blackish except for the small joints of the tarsi and hind 

 metatarsi which are more or less dark brown, legs covered with brownish and 

 whitish hairs; scopa typical, its hairs almost white, except at base above 

 where they are dark brownish; hind metatarsi at most apparently as wide 

 as the mid-metatarsi; propodeum with its enclosure well defined, shiny, 

 finely reticulated and coarsely irregularly ridged; rest of upper face of pro- 

 podeum sculptured somewhat like the mesopleurae and covered with similar 

 whitish hair; propodeal pleurae partly dullish, partly shiny, finely reticulated 

 and with rather indistinct scattered shallow punctures; floccus whitish; 

 abdomen not banded, with its tergum shining, finely reticulated, punctured, 

 its punctures smaller and closer on the elevated portion than on the depressed 

 portion, the punctures adjoining or nearly adjoining on the first tergite, 

 hardly closer on the elevated portion of the succeeding tergite; third and 

 fourth tergites with the elevated portion less closely punctured, apical edge 

 of first, second, third and fourth tergites with a brownish border; second 

 tergite with its elevated portion down the middle : depressed portion : : 15 : 

 11; fifth tergite shining, sculptured much like the propodeal pleurae except that 

 the punctures are more obvious and closer; pygidium with an embossed, 

 reticulated, triangular area bounded by a smooth depressed margin, truncate 

 at apex; tergum with inconspicuous, pale, nearly erect hairs; fimbria dull 

 golden. 



Allotopotype. — April 22, 1917, plum flowers (W. L. McAtee). 

 Related to A. (S.) alleghaniensis Viereck. 



Male. — Length 8 mm.; body black, mostly covered with whitish hair; 

 head with its facial fine : transfacial fine : : 48 : 61; axial fine : temporal 

 line : : 26 : 16; temples simple, rounded; malar line : joint 3 of antennae 

 : : 1 : 5; elevated portion of malar space wanting; hairs of head concolorous; 

 front indistinctly punctured, shiny and finely longitudinally striate ; ocellocu- 

 lar fine : ocelloccipital line : : 13 : 4; face shining, distinctly punctured, its 



