1920] Bequaert — Hymenoptera Collected near Boston 11 



(Robertson), though often seen in southern New Jersey, appar- 

 ently do not reach New York City. 



The vicinity of Boston thus seems to be in some way the meeting 

 ground of certain Boreal and Austral elements, while forms of the 

 Transition Zone constitute the bulk of the local fauna. This may 

 be one of the reasons why the insect fauna of that region contains 

 such a variety of species. Though I was able to devote to collect- 

 ing only a few odd hours during two of the last summer months, I 

 have to my great surprise taken there many unusual Hymenoptera, 

 among them certain species which I had not seen before in the 

 northeastern states. It will, I believe, be interesting to put on 

 record some of my captures. 



Pach5Tiienes symmorphus (Saussure). Two females were taken 

 in the Arnold Arboretum at Forest Hills, July 5. This wasp has 

 been placed by H. de Saussure in the genus Nortonia. I have 

 shown elsewhere^ that Nortonia may best be restricted to the 

 species with a transverse raised suture on the first abdominal 

 tergite; whereas such species as the nearctic A'^. symmorpha Saus- 

 sure and N. tolteca Saussure, in which there is no raised suture on 

 tergite one, cannot in my opinion be generically separated from 

 Pachymenes. I have also P. symmorphus from Greenwood Lake, 

 N. Y., 9 , August 20, 1916; White Plains, N. Y., d", at flowers of 

 Ceanothus americanus, June 29, 1918; Stowe, Lamoille County, 

 Vt. (E. L. Bell Coll.). Mr. Wm. T. Davis has taken a 9 at Ram- 

 sey, N. J., July 19, 1908, and a cf at Cabin John Run, Md., June 

 17, 1910. 



Ancistrocerus unifasciatus (Saussure). One female at Lexing- 

 ton, July 27, 1919, and another at Forest Hills in June. 



Anacrabro ocellatus Packard. This was very common at Forest 

 Hills in the latter half of July, visiting Ceanothus americanus; I have 

 also taken it at Lexington on Spiro'a salicifolia, July 27. 



Euspongus bipunctatus (Say) = Paramellinus bipunctatus 

 Rohwer. Forest Hills, August 3, 1919; one female running about 

 on leaves of pickerel weed in the Arnold Arboretum. 



Anthophora walshii Cresson. One female sucking ^loney at 

 flowers of Ballota nigra, Forest Hills, July 27, 1919. I saw a male, 

 which I was unable to capture, at the flowers of Pontederia cordata. 

 Forest Hills. Mr. C. W. Johnson informs me that the collection 



1 Bull. Amer. Mus. Nat. Hist., 39, 1918, p. 93. 



