104 Psyche [June 



Plates of abdominal segments uniformly pigmented, without transparent dots 

 along their posterior margins 5 



2. Front almost twice as broad behind as long 3 



Front narrower in proportion to its length; three bristles on lateral margin of 



front above the antennal ca\4ty 3 



3. Head viewed from the side twice as long as high. . . (Jamaica, B. W. I.) 



jamaicensis Brues. 

 Head viewed from the side only one-half longer than high. (Bismark Archi- 

 pelago.) dorsalis Wandolleck. 



4. Thorax greatly constricted medially, its length at the sides over twice that at 



the middle. (Sumatra.) depressus de Meijere. 



Thorax less strongly constricted medially, much less than twice as long at the 

 sides as at the middle. (German East Africa.) kiboshoensis Brues. 



5. Lateral margin of front above antennal ca\nty with one or more bristles wliich 



are much larger than the sparse hairs covering the head 6 



Lateral margin of front without any bristles above the antennal cavity; fourth 



dorsal plate of abdomen much longer than the third. (Guatemala.) 



buccaia Malloch. 



6. Lateral margin of front with a single bristle above the antennal cavity. 



(Mexico.) mexicanus Silvestri. 



Lateral margin of front with three bristles above the antennal cavity. (India.) 



fletcheri Schmitz. 



AN OBSERVATION ON THE BREEDING HABITS OF 

 STIGMUS CONESTOGORUM ROHWER. 



By C. H. Richardson, 

 New Brunswick, New Jersey. 



In a number of galls of Holcaspis glohulus gathered from white 

 oaks on September 13, 1914, at New Brunswick, N. J., was one 

 inhabited by the wasp, Stigmus conestogorum. The dried condition 

 of the gall showed that it had been deserted by the original owners. 

 The wasp had formed numerous passage-ways in the pith which 

 terminated in oval-shaped chambers. These chambers w^ere 

 filled with green aphids upon which lar^'£e, presumably of this 

 species, were feeding. Since the female wasp was captured in the 

 nest, it is possible that the larvae of this species are attended by the 

 parent throughout their active feeding period. 



Stigmus fraternus and other Pemphredonidse are said to burrow 

 in the dried pithy branches of various kinds of plants and to fill 



