AMERICAN HYMEXOPTERA. 5)9 



ish yellow, extreme tip of tarsi more or less brownish (one of my specimens has 

 the hind tihise and tarsi somewhat infuscated) ; wings hyaline, veins jiale: areclet 

 almost obsolete, as one side of it only (which is the prolongation of the second 

 transverse vein) is stout and distinct; the two other sides, as well as the whole 

 course of the cubital vein, are almost obsolete." 



This species was bred by both Walsh and Osten Sacken t'roiu the 

 galls of Amphibolips spongijica O. S., and Osten Sacken also bred it 

 from Holc(i.'<p'iK cenfrlcola O. 8. I have ({uite a nuinher of specimens 

 in my collection that I bred from Holcaspls (jlobala.-i Fitch in Mich- 

 igan and from Holcaspis rubens Gill, collected at Manitou this State. 



Group III (Antennse of Females 15-jointed). 



Only three species have been described in this grouj), and they 



may be separated as follows : 



A. Thorax coarsely transverselj' wrinkled magnus Gill. 



AA. Thorax finely sculptured, not distinctly transversely wrinkled. 



B. Abdomen blackish throughout ; small species, not exceeding 2.5 mm. 



laiite Fitch. 



BB. Abdomen largely yellow ; large species, exceeding 2.5 mm • • villosiiN Gill. 



Synergiis inagnus Gill. 



Si/tieniii.i magiiiis Gill., Bull. 111. Lab. Nat. Hist, iii, 1890, p. 202, J. 

 Syuergus magntin De Dalla Torre, Cat. Hymen, ii, 1893, p. 112. 



"Head rufous yellow, vertex and thorax entirely black, abdomen rufous yel- 

 low, except a narrow black stripe along the tergura of the second segment, feet 

 light yellow, except the tibiae and tarsi of the hind pair, which are infuseate. 

 Length 4 mm. 



" Head : face coarsely striate, vertex and occiput microscopically rugulose and 

 with broad punctures; antenna; black, as long as the insect, 15-jointed, third joint 

 but little longer than the fourth. Thorax with coaree, transverse wrinkles, par- 

 apsides distinct throughout, median groove reaching the posterior ends of the 

 parallel lines; the lateral grooves appear more like ridges, and are short and ob- 

 lique; shoulders coarsely wrinkled, pleunc very coarsely aciculated below and 

 very finely aciculated above, with a smooth, shining spot mid\v'ay upon the most 

 prominent part; scutellum with two small fovefe and coarsely rugose. Abdomen : 

 firet segment, as well as the petiole of the metathorax, coarsely wrinkled or 

 fluted, second segment occupying nearly the whole surface of the abdomen, ovi- 

 positor sheaths long and projecting upward above the line of the tcrgum, venter 

 considerably projecting. Wings long, narrow and slightly smoky, areolet 

 medinm." 



The above description was made from a single female bred from 



the galls of Amphibolips cookii Gill, gathered at Lansing, Midi. 



TRANS. AM. ENT. SOC. XXIII. ■ MARCH, 1896. 



