82 NEMATCJS CLERULEOCAEPUS. 



On fhe Continent it has been so much mixed up with 

 the next species that it is difficult to give its distribu- 

 tion with certainty. According to Thomson it is 

 spread over Sweden, is found in Germany and France, 

 and Eversmann records it from the province of Casan. 



Nothing definite is known regarding its early history, 

 but it seems probable that it is attached to the aspen. 



25. NEMATUS CLERULEOOAKPUS. 



Vol. I, PL VII, fig. 6, Larva; Vol. II, PL II, fig. 7, 

 ? ; PL XVII, fig. 5, Saw. 



Nematus cceruleocarpus, Hart., 187, 8; Toll., Tijd. Ent., i, 



148, pi. 6; Zool., s.8. 7526 (lar.); 

 Kalt., Pfl., 558 and 578; Cam., 

 Proc. Nat. Hist. Glas., ii, 312; 

 Andre, Species, i, 113; Cat., 14,* 21. 



propinquus, Dbm., Clavis, 25, 24 (lar.). 



vicinus, Lep., Mon., 197, 66 ; Ste., 111., vii, 38. 



br achy acanthus, Thorns., Opus., 629, 34 ; Hym., 



Scand., i, 123, 50. 



brevispinis, Foer., Verb. Ver. Rheinl., xi, 338. 



gelidus, Kirby, List of Hym., i, 115, pi. vii, f. 10. 



Black, shining, densely covered with fuscous pile. Legs red, 

 coxae at the base, and apical half of posterior tibiae and the posterior 

 tarsi black ; spurs short, reddish. Wings hyaline, costa fuscous, 

 stigma black. $ and $ . 



Length 3f 4 lines. 



Ab. a. Abdomen reddish underneath. 



Cceruleocarpus is distinguished from crassus by its 

 smaller size, by the longer and thicker pile on the 

 pleura and mesonotum, the reddish apex of the coxse 

 and the trochanters, the short reddish posterior spurs, 

 which are scarcely one-third the length of the meta- 

 tarsus ; the wings are clearer and the posterior tibiae 

 have not so much of their apices black. 



The larva has the head pale brown, with two dark 

 stripes on the sides, meetiog at right angles on the 

 vertex. The legs are greenish-yellow with brown 

 claws. The body is bluish-green, irregularly covered 

 with black dots, each ending in a hair ; along the sides 

 there is a row forming a distinct, though slightly 

 interrupted, line ending on the twelfth segment ; the 



