V0 1889. n '] PROCEEDINGS OF THE NATIONAL MUSEUM. 397 



apical edge of the fifth segment is also red; the petiole is shining 

 black, minutely longitudinally aciculated. Wings hyaline, strongly 

 iridescent; teguhe yellow; stigma and veins brownish-black. 



Habitat. — Lafayette, Iud. 



Described from two specimens, reared by Mr. F. M. Webster, from 

 Plutella cruciferarum. 



Subfamily CRYPTIN.E. 



STILPNUS Grav. 



Stilpnus texanus sp. nov. 



Female. — Length, 5.G mi ". Head, thorax, petiole, a narrow streak at 

 base of second abdominal segment, the fourth and following segments, 

 except an oblique lateral blotch on the fourth and extreme apical edges 

 of this and following segments, black, the second and third segments 

 and the apical edges of the other segments, rufous. Legs, yellowish- 

 red, the posterior tibiae black at base and apex, tarsi fuscous. The 

 head and thorax are polished, covered with a white glittering pile, 

 which is denser on the face ; metathorax rugose, areolated, the spira- 

 cles small, round. Mandibles red, palpi yellow. Antenna? 22-jointed, 

 black, scape with a reddish blotch beneath, the first joint of flagellum 

 is the longest, although only slightly longer than the second. Thorax 

 with distinct parapsidal grooves. The abdomen is oval, with a long 

 petiole, the petiole being but slightly wider at the apex than at base, 

 only slightly bent and with two longitudinal keels above and two along 

 the sides, the spiracles being placed at about the middle; the body of 

 abdomen is composed of only five segments, the first three comprising 

 the greater part of it and moderately minutely punctate and pubescent; 

 the ovipositor short, hardly as long as the three terminal segments. 

 Wings, dusky hyaline; teguhe yellowish; stigma and veins, brown- 

 black; the cubituc is broken much before the middle by a stump of a 

 vein, the areolet pentagonal, the lower outer side being a little shorter 

 than the upper side, while the other sides are about of an equal length. 



Habitat. — Texas. 



Described from one specimen in the Belfrage collection. 



EXOLYTUS Fmster. 

 Exolytus gelechiae sp. nov. 



Male. — Length, 5 mm : black, snbopaque, minutely shagreened, the 

 apical margin of the second and lateral and apical margins of the third 

 abdominal segments and the venter, yellowish-red. Antennae 29-jointed, 

 black, the scape beneath and the third joint at base, red; palpi, white. 

 Legs, reddish-yellow ; the coxre and trochanters, black. Thorax with 

 parapsidal grooves distinct anteriorly; metathorax scabrous, areolated; 

 the spiracles small, round. Abdomen 7 -jointed, elongate, the petiole 

 widened at apex and longitudinally aciculated, the small spiracles are 



