698 



BOSTON JOURNAL 



useful to give the above more detailed and characteristic descrip- 

 tion than that quoted, which is too short and unimportant. A 

 good name for this species would be gladiator. 



4. A. DENSATUS. — Black; thorax rufous; tergum densely 

 punctured. 



Inhabits Indiana. 



Body black, with short, small hairs : above with a white spot ; 

 face, below the antennse, and mouth, pale yellowish : antennae 



: thorax reddish-brown; with an abbreviated black vitta : 



scutel reddish-brown : wings hyaline ; nervures fuscous ; stigma 

 yellowish : abdomen sublinear, not attenuated towards the base, 

 but in the first joint: tergum with dense, rather large, but not 

 profound punctures; posterior edges of the segments slightly 

 rufous : oviduct nearly half the length of the abdomen : feet dull 

 yellowish ; coxas and trochanters whitish ; tips of the tibiae and 

 of the tarsi dusky. 



Length 9 over one-fifth of an inch. 



5. A. RECURVUS. — Black ; feet honey-yellow ; posterior tibiae 

 and tarsi with black joints. 



Inhabits Indiana. 



Body rather slender, black : head not extended behind the 

 eyes : orbits, nasus and palpi white : thorax trilobate (as in Xori- 

 des and Pimpla^ with a white line before the wings : metathorax 

 long, convex : tergum equal in width, basal segment a little nar- 

 rower at base; segments subequal in length; first and second 

 segments with a transverse impressed line near the tip ; remain- 

 ing segments, excepting the last, with a lateral, transverse, im- 

 pressed [244] line at their middles : oviduct less than half the 

 length of the abdomen, a little recurved at tip : feet honey-yel- 

 low ; intermediate and posterior pairs of tarsi white, the joints 

 black at their tips ; posterior pair of tibiae black, white in the 

 middle. 



-^ much smaller : thorax tinged with pieeous ; hypostoma 

 white; pectus honey-yellow; feet paler than in the female. 



Length three-tenths of an inch. 



The metathorax is convex as in Xortdes, elongated, but the 

 head is transverse and not globular. 



[Vol. I. 



