132 NEUR0TERUS LENTlCULARlS. 



The parasitic Torymus I have found as an external 

 feeding larva on the Neuroterus in April ; it lays its 

 eggs in the galls in September. 



Sexual Form. — Black ; antennse brownish, the basal 2 — 5 joints 

 brownish or clear yellow; legs yellow, the coxas at the base only or 

 entirely black. Thorax and vertex opaque or semi-opaque, aciculated, 

 especially on the lateral lobes of the mesonotum close to the furrows of 

 the parapsides, where the aciculation becomes striated or wrinkled ; 

 the middle lobe more shining, but very slightly aciculated. Scutellum 

 strongly wrinkled. Wings longish, broad at the apex, hyaline or sub- 

 hyaline, a brown splash in first cubital cellule. Ovipositor short. 



The (J has the third joint a little curved. 



Length 2 — 2^ mm. 



The furrows of the mesonotum tend to become 

 obsolete ; the brown spot in the cubital cellule is not 

 always present or clearly defined; the base of abdo- 

 men may be brownish, and the femora in the $ are 

 occasionally suffused with fuscous. 



Gall. — Berry -shaped or pea- shaped, spherical, 

 smooth, soft, succulent, green with reddish cheeks, or 

 entirely green ; found on the under side of the leaf, in 

 which case the attached base appears through the 

 upper surface, or on the male catkins. The larval 

 chamber surrounded by a whitish layer. The catkin 

 galls generally smaller than the leaf ones. When 

 the flies leave, the galls shrivel up, except those 

 inhabited by inquilines. Diameter from 3 to 6 mm. 

 Found in May and early in June, the insects escaping 

 at the middle of June. 



Inquilines. — 8ynergus facialis, Htg., 8. radiatus, 

 Mayr, and 8. albipes, all in the same year; likewise 

 8. apicalis and 8. ruficornis, according to Brischke. 



Parasites. — Torymus abdominalis, T. incertus, T. re- 

 gius, T. auratus, Eurytoma rosse, Eupelmus annulatus, 

 JNees (Giraud) ; Pteromalus immaculatus, West. (Gi- 

 raud) ; Tetrastichus atrocaeruleus, Nees (Giraud). 



According to Mr. C. G. Barrett, the Tortrix 8cia- 

 'phila communana lives in the galls. 



The galls being so soft and succulent, the develop- 

 ment of the flies of necessity must proceed rapidly, 

 or otherwise they would perish through the galls 



