PARASITIC IIYMKNOl'TKliA. 211 



red, except a suhapical black streak on the third sesjiiieiit, and the followinji sejr- 

 luents wliich are black, excejit the narrow apical edges; anteniise 'io-joiiited. 

 basally yellow, tlie apical two-thirds dark brown : nietathorax abruptly truncated 

 posteriorly, areolated. Wings hyaline, iridescent, stigma and veins brown, the 

 former with a large jtale spot at Itase ; teguUe yellowish white. 



Hub. — St. Louis, jN[o. 



Described from a single specimen labeled No. 414-^"', reared July 

 8, 1881, from Eiu'i/pfijc/nd sa/if/neaHU Clem. 



Tril)e IV. Pezomach'iuL 



C'KI<L^Ii\ODKS Forster. 

 C'reiiiiioflc!< jilitMkeiiNiM sp. n. 



J. — Length about (i mm. Uniformly rufous, smooth, j)olished ; collar at sides 

 slightly wrinkled ; mesopleura striated ; metathoracic carina strong, elevated into 

 acute teeth at sides. Head subtiuadrate. the face prominently convexly swollen, 

 punctate: maxillary pali)i long, 4-,jointed ; antennae 18-jointed, gradually incras- 

 sated toward tips, the tips dusky. Abdomen pear-shaped, subcompressed. polished, 

 the petiole very long, slender throughout, and nearly as long as the hind femora, 

 longitudinally striated, the spiracles prominent, situated a little behind the mid- 

 dle, the second segment very large, occupying most of the surface, the following 

 segments short, subequal ; ovipositor very short, less than one-third the length 

 of the petiole. Legs long, rather slender, the hind pair much the longest, coxae 

 punctate. 



Hab. — Fort Wrangle, Alaska. 



Ty[)es in N:itii)nal ^Fuseum (H. F. AVickham, collector). 



4'reiniio<le!< tiiberviilatiis sp. n. 



9 . — Length less than 5 mm. Pale ferruginous, but in other particulars, except 

 as follows, agrees with C. alasketisis : The prominent convex face is transversely 

 wrinkled ; palpi whitish ; posterior lateral margins of mesothorax tuberculate ; 

 nietathoracic spines shorter, only slightly developed, the po.sterior face wrinkled, 

 while the slender petiole of abdomen is jierfectly smooth, except a slight median 

 longitudinal line. 



Hab. — Santa Cruz Mountains, California. 



TIIKKOSC'OFUS Forster. 



TheroNCopiis ain«ricaiiii!!> Ashm.. n. sp. 



■J, . — ]..engtb 2.1 mm. Ferruginous, subopatjue, minutely shagreened ; vertex, 

 pleura, sutures around scutellum, jnetathorax, except disc at base, and disc of 

 petiole, fuscous or blackish. Abdomen black ; ])etiole, except as before mentioned 

 and the extreme apex which is yellowish, ferruginous ; apex of second segment 

 yellowish. Legs and antennre honey-yellow. Head broad, subquadrate; ai;- 

 tennse as long as the body, 19-jointed (V). Thorax elongate, narrowed, the scutel- 

 lum minute, but distinct; wing pads very small, whitish, scale-like; nietathorax 

 about two-thirds as long as the mesothorax with the collar, rounded behind, 

 hut with a transvei-se carina above : al)domen oblong-ovate, much broader than 

 thorax, the petiole very gradually dilated towards ape.\. 



Hub. — Arlington, Va. 



Reared April 10, 1885, from a Biicculatrix cocoon found under 

 stone. 



TRANS. AM. ENT. SOC. XXIII. JUNE, 1896. 



