52 THE CANADIAN ENTOMOLOGIST. 



My specimens were collected in 1878 and in 1880 at Redwood City, 

 Cal., by Mr. \Vm. Sutton, of San Francisco. 



There are some very large specimens of these galls in the Museum at 

 Cambridge, collected in Cal. by Baron Osten-Sacken, I believe. They 

 are, with a single exception (Cynips punctata B.), the largest galls known 

 to me, and I have given them the name of the State in which they, and 

 so many other natural objects of surprising magnitude are found. 



The insects gnaw their way out of the galls in October, but of the 

 growth of the galls themselves I have no information. The insects are 

 all females, and belong to the agamous generation, and in structure they 

 differ but little from C. inanis, C. adculata, C. spongifica and many others 

 that are, as yet, known only in the female sex. 



The insect is described as follows : 



Head small \ ocelli medium size, very close together. Face covered 

 with short white hairs which are appressed, and which converge towards 

 the mouth. Mandibles large and heavy, shining black at the tips. Max- 

 illary palpi 5-jointed, labial 3-jointed. Antennae with fourteen joints ; 

 ist joint short, rather thick ; 2nd small, globose; 3rd equal in length to 

 the two preceding together ; 4th to the 13th gradually shorter ; 14th long 

 as the two preceding taken together. Thorax with short appressed hairs, 

 and with grooves as follows : Two parallel lines start near together on the 

 coUare, near the dorsal summit, and extend half way to the scutellum ; two 

 similar but rapidly diverging lines from the same point on the scutellum, 

 extending half way to the collare. Two starting from the scutellum outside 

 the first pair, and extending to the base of the wings ; these last are 

 nearly parallel. All these grooves are smooth and shining, but very fine 

 and only seen to advantage under a magnifier. 



Scutellum nearly oval, surface slightly shagreened and with a it'f! scat- 

 tering white hairs. Fovse indistinct or wanting. 



Pleurae and legs covered with short shining white hairs. Tarsi dark 

 brown, ungues black. Basal half of the first abdominal segment hairy. 

 Sheath of the ovipositor dark shining brown, not exserted. Ventral hairs 

 microscopic. 



Wing veins dark brown, surface of the wings covered with short fine 

 hairs ; radial area o[)en, areolet of medium size. The head — except from 

 the mouth to the occiput, which is black — the antennae and the entire 



