- 
166 Mr. J. B. Bridgman on some additions to 
Orthocentrus corrugator, Holm. 
Holm., Mon. Try. Suec. 329, 8, 3. 
Entom. xiv. 92. 
PIMPLIDA. 
Pimpla diluta, Ratz. 
? Ratz., d. Ichn. d. Forst. ii. 102, 37, 2; Holm., Mon. 
Pimp. Suec. 28, 23, 2. 
Of this species Holmgren describes the male only. I 
have taken two or three females at Brundall, and within 
three or four yards of the same spot some males, which 
I believe to be undescribed, but so exactly like diluta 
female in colour that it can, I think, be no other than 
the male of that species. The only difference to be 
found in Holmgren’s description is in the length of the 
abdominal segments; the seven first segments are 
elongate, not transverse; the abdomen is nearly three 
times longer than the head and thorax; the 2nd 
segment is nearly twice as long as wide; and it differs 
also in having the abdomen very glabrous, and with no 
punctures. In the female the abdomen is thickly 
punctured. It would almost appear that the male is a 
Theronia and the female a Pimpla, thus uniting the two 
genera. I thought at one time it might be a variety of 
Theronia, but such is not the case. Mr. EK. A. Fitch 
kindly sent me V’heronia from Kaltenbach’s collection, 
and they are very different. Im the hind wing of 
Theronia the transverse anal nervure is placed behind 
the brachial fork, and divided distinctly above the 
middle, whilst the male and female P. diluta have it 
opposite the brachial fork, and divided almost in the 
middle, or a trifle below. The head, also, in the six or 
seven males | have taken is black, and not pale; neither 
have I seen any yellow on the scutellum. 
Pimpla abdominalis, Gr. 
Grav., I. E. iii. 150, 9; Brischke, D. Ichn. d. Prov. 
W: a. fi. Preas. “7, @. 
Dr. Capron captured three males and two females of 
this very distinct species in the neighbourhood of Shere, 
Surrey, last year. It is unnoticed by most authors, and 
Gravenhorst only described the female. The male only 
differs in having a few black spots on the middle 
