C. H. Richardson.
An Observation on the Breeding Habits of Stigmus conestogorum Rohwer.
Psyche 22:104, 1915.

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104 Psyche [June
Plates of abdominal segments uniformly pigmented, without transparent dots along their posterior margins. ..................................... .5 8. 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 antenna1 cavity. .................................... .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 cavity with one or more bristles which 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.). ....... buccafa 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.) fietcheri 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 globulus 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 were filled with green aphids upon which larvse, presumably of this species, were feeding. Since the female wasp was captured in the nest, it is possible that the larvse 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



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