1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 029 



meut is partially divided by a transverse suture laterally. The two 

 basal auteunal joiuts, the collar, aud legs are yellow; antennae, 22- 

 jointed ; otherwise as in B. airiceps. 



The male is similar to the female, only the 1st abdominal segment and 

 the terminal joints beyond the 2d are black ; the small apical segmeuts 

 have a transverse row of punctures across each segment. 



Habitat. — Lafayette, Indiana. 



Described from three specimens, one male, two females, labeled No. 

 3412°, and reared June 3, 1883, from Loxotenia clemensiana, a leaf folder 

 on wheat received from Mr. F. M. Webster, of Lafayette, Indiana. 



(?) Rhyssalus selandriae n. sp. 



Female.— Length, 3§ lmn ; ovipositor, l mm . Honey-yellow; form elon- 

 gated. The head, antennae, and ovipositor, pale ferruginous; eyes, 

 brown. Antennae, 31 -jointed, very long and slender, about one and a 

 half times as long as the whole insect, the flagellar joints being about 

 six times as long as wide ; parapsidal groove distinct; the scutellum 

 with a transverse, crenulated furrow at base ; metathorax smooth but 

 delicately areolated ; abdomen, ovate ; 'the 1st and basal half of 2d, the 

 transverse furrow across it, aud the sutures of the 3d and 4th segments, 

 longitudinally aciculated; rest of insect smooth, polished. Wings, 

 hyaline ; veins, pale yellowish ; the 1st transverse cubital nervure is 

 very delicate, almost obliterated. 



Described from two female specimens, labeled, " Probably parasitic 

 on Stlandria cerasi, July 5, 1870." (Coll. C. V. Riley.) 



Notwithstanding the three submarginal cells, this species is closely 

 related to the genus Recabolus, and the tout ensemble like Cauiophanes 

 Forster, and it probably belongs in the group with these genera. The 

 groups Eecabolina' and Rhyssalina' are separated upon very slight differ- 

 ences, and it would be more natural to unite them as one group. 



(?) Rhyssalus trilineatus u. sp. 



Male.— Length, 2" 11U . Head, thorax, and 1st abdominal segment black; 

 two basal antennal joints, palpi, tegulae, and legs pale honey-yellow or 

 yellowish white; flagellum and abdomen dusky, the latter brownish. 

 The head is transverse, smooth, polished ; mandibles pale, tips black ; 

 antenna? 21-joiuted, slender, the flagellar joints of nearly equal length, 

 about 4 times as long as wide; parapsidal grooves distinct, yellow, 

 the middle lobe impressed posteriorly in front of the scutellum, with a 

 central grooved line extending to the base of the scutellum ; prothorax 

 yellow ; the scutellum has a grooved line across the base, separated into 

 two equal portions by a raised line in the middle; metathorax rugose, 

 with two keels dowu the center ; abdomen ovate, the 1st segment rugose, 

 the others irregularly wrinkled. Wings hyaline; veins pale brown; 

 thesubmedian cell is longer than the median, and the recurrent nervure 

 is not interstitial, but joins the 2d submarginal cell at its lower posterior 

 angle. 



