40 ENTOMOLOGICAL NEWS [xxxii, '21 



Practically all of these species are now recognized by 

 students of Hymenoptera and while most of them are repre- 

 sented in the National Collection, yet so far as I have been 

 able to determine there are no specimens which can be con- 

 sidered as type material. Patton's descriptions, on the whole, 

 are very satisfactory and we have less trouble understanding 

 his species than we do those of some of the other students 

 who worked at about the same time. In his revisionary work, 

 Patton described thirteen genera ; eight of these belong to the 

 superfamily Sphecoidea and five to the superfamily Apoidea. 

 Among the bee genera are such common and well recognized 

 ones as Bombomelecta, Diadasia, Emphor and Entechnia. 

 Among the wasp genera the ones which are recognized all 

 over the world are Isodontia, Aphilanthops, Larropsis and 

 Microbembex. The other four wasp genera have been recog- 

 nized by some students, while certain other students consider 

 that they are founded upon too trivial characters to be treated 

 as genera. 



In looking over Patton's papers I have been struck with 

 the fact that while practically all of his systematic work was 

 done on Hymenoptera, most of his biological observations 

 were made on lepidopterous insects. 



Notes on Some of van der Wulp's Species of North 

 American Anthomyiidae (Diptera). 



By J. R. MALLOCH, Urbana, Illinois. 



In working up the Anthomyiidae of North America I have 

 found some difficulty in placing most of the described forms in 

 their proper genera and this has been especially true of the 

 species described by van der Wulp. At my request Mr. F. W. 

 Edwards obtained for me specimens of twenty-four of the 

 species from the original series in the British Museum as an 

 exchange. These specimens have been used as a basis fof the 

 following notes and have been incorporated in the collection 

 of the Illinois State Natural History Survey. They are un- 

 doubtedly paratypes of the species listed. 



