238 On the Hymenoptera of the Genus 



I have not seen this species. 



Sp. 4. A. abdominalis. Nov. spec. Color black ; anten- 

 nae at tip and the scutellum white ; abdomen testaceous. 

 ( 9 Long. 0.37 in. Ex. alar. 0.75 in. $ Long. 0.30 in. to 

 0.35 in. Ex. alar. 0.65 in.) 



9 $ Head and thorax black ; the four apical joints of 

 antennre white ; clypeus, labrum, and trophi honey-yellow; 

 mandibles black at tip ; clypeus retracted and deeply 

 emarginate, posterior edge black ; labrum wider than long, 

 somewhat angulate, and fringed with yellow hair ; a blunt 

 red spine between the antennae; scutellum, two dots be- 

 hind, and (commonly) the ridge of metathorax, white; 

 abdomen and legs testaceous ; first segment of abdomen 

 black at base and edges ; basal half of coxae, the four an- 

 terior femora, apex of posterior femora, and all the feet, 

 black ; apex of coxae, the trochanters, and base of femora, 

 white. Wings faintly clouded ; nervures black ; basal 

 half of stigma white ; wing-scale piceous. 



Hab. Farmington, Conn. 



Eleven specimens examined. The apical segments of 

 the abdomen are sometimes black in the males. This is 

 closely allied to A. apicalis of Say. 



Sp. 5. A. trisyllabus. Say. H. Cat. Undescribed. 

 Black ; a white band on antennae near the tip ; edge of 

 collar, V spot, and scutellum, white. (Long, about 0.40 

 in. Ex. alar. 0.80 in.) 



9 Head, thorax, and abdomen, black ; five apical joints 

 of antennae, base of fifth, and apex of ninth, black ; clyp- 

 eus, labrum, spot at base of mandibles, and palpi, white; 

 clypeus produced, emarginate, and sprinkled with piceous 

 dots ; labrum with similar dots, rounded, sometimes almost 

 truncate, and covered with scattered hair ; edge of collar, 

 V spot, scutellum, two dots behind, a line at apex and an- 

 other at base of metathorax, and a narrow, short line at 

 apex of four basal segments of abdomen, white ; legs 



