HENRY J. FRANKLIN. 453 



Female. — Face mostly dark ; occiput with yellow pile ; thoracic dor- 

 sum, and pleura yellow ; dorsutn of abdomen black, but the third seg- 

 ment often with more or less yellow pile, and segments one, two and 

 four sometimes with touches of yellow, especially on the sides ; venter 

 and legs dark ; malar space rather long ; hind metatarsi narrow for 

 their length . 



Male. — Face dark ; occiput usually with much yellow pile ; thorax 

 yellow, with or without a black interalar band; dorsum of abdomen 

 usually with the first two or three segments mostly or entirely covered 

 with yellow pile, the remainder being black ; venter and legs black. 



Female. Head. — Face often with a faint touch of yellow above the 

 bases of the antennae, but as often entirely dark ; occiput with a large 

 triangular patch of pure yellow pile; cheeks dark. Apical margin of 

 the mandibles sometimes entire, but usually with a notch in the mid- 

 dle. Malar space shorter than its width at the apex, about one-fourth 

 as long as the eye. Clypeus with its anterior portion more or less 

 sparsely punctate in the middle, the remainder being coarsely and 

 densely punctate. Flagellum of antenna more than one and four-fifths 

 times as long as the scape ; third and fifth antennal segments subequal 

 in length, the fourth distinctly shorter than either. 



Thorax. — Dorsum covered with yellow pile, the very center of the 

 disc being naked ; mesopleura yellow to the bases of the legs ; meta- 

 pleura occasionally mostly dark, but usually clothed for the most part 

 with yellow pile; sides of the median segment usually mostly dark, 

 sometimes with a little yellow pile. 



Abdomen. — Dorsum, segment one usually entirely dark, but often 

 with a touch of yellow on each anterior corner ; segment two usually 

 entirely black, but occasionally with yellow pile on its apical margin ; 

 segment three often entirely black, but usually with more or less yellow 

 pile, at least on the sides, and sometimes entirely covered with it ; seg- 

 ment four usually entirely black, but occasionally with touches of yel- 

 low pile on the sides and a fringe of yellow along the basal margin ; 

 segment five black ; segment six black, but with the apex bearing more 

 or less brownish-ferruginous pubescence. Venter dark, but the apical 

 portion of the last segment with considerable brownish-ferruginous 

 pubescence. Hypopygiutn with lateral elevations much as in insularis. 



Wings. — Moderately stained with brown ; the fore pair usually dark- 

 est in the region beyond the veins. 



Legs. — Dark ; the hind metatarsi nearly three times as long as their 

 greatest breadth, their hind margins being only slightly curved. 



Male. Head. — Face black, sometimes with a very faint sprinkling 

 of yellow hairs above the bases of the antennae ; occiput with a tri- 

 angular patch of yellow pile, often with black hairs admixed ; cheeks 

 entirely dark. Malar space shorter than its width at the apex ; between 

 one-fifth and one-sixth as long as the eye. Clypeus covered with 



TRANS. AM. ENT. SOC. , XXXVIII. 



