2 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 



followed by a description of the allotype, if available, and by com- 

 ments upon the variations and peculiarities of the species as showTi 

 by paratypes when the new species is described from a nimiber of 

 specimens. In the case of species already described a detailed 

 description of each sex is given whenever both sexes were represented 

 in the collections, and these descriptions, except where noted, are 

 based not upon single individuals but upon the groups of specimens 

 at hand. The drav,angs of the wmgs are made from projections of 

 balsam mounts and are all enlarged on the same scale. The figures 

 of all other parts are camera lucida drawmgs and, save where noted 

 in the explanation of the plates, are drawn exactly on the same scale 

 of magnification. Consequently these drawings show accurately the 

 relative size of similar structures on the various species. All draw- 

 ings are the work of the writer save Nos. 213 and 216, which are the 

 work of Mr. Noel Deisch. 



The generic name Monedula Latreille (1802) must be dropped, as 

 Fox has pointed out,' suice it is preoccupied in ornithology by Mone- 

 dula Hasselquist (1762). lUiger was aware of this prior use of the 

 term and proposed the name Stictia^ to replace it. The species 

 included in the genus Monedula., as given in Handlirsch's mono- 

 graph, fall into four groups that possess characters sufficiently dis- 

 tinct to warrant, in the writer's judgment, their separation into 

 good genera. To one group the generic name Stictia must be apphed 

 and this genus is represented by the species Carolina Fabricius and 

 signata Linnaeus. For the second the name of Stictiella is proposed, 

 with the species formosa Cresson as the type. For the third the sub- 

 generic name Hemidula Burmeister must be raised to generic rank 

 with singularis Taschenberg as the type. For the fourth a generic 

 name is yet to be proposed and it can not properly be done here since 

 none of the species belonging in this group are found within the 

 region covered by this revision. 



The writer desires to acknowledge here his indebtedness to Prof. 

 Herbert Osborn, of the Ohio State University, under whose super- 

 vision and direction this work has been done; to the authorities of 

 the United States National Museum for valuable assistance rendered 

 in the course of the v/ork, and for the privilege of laboratory f acihties 

 and access to its collections and library. The writer further desires 

 to express his appreciation of the kindness of the foDowing gentlemen 

 in placing at his disposal collections of Bembicine wasps found in the 

 institutions with which they are (or were) respectively connected : Dr. 

 H. T. Fernald, Massachusetts Agricultural College; Prof. George A. 

 Dean, Kansas State Agricultural College; Dr. J. C. Bradley, Cornell 

 University; Dr. S. Graenicher, Pubhc Museum of Milwaukee; Dr. 

 Henry Skinner, American Entomological Society of Philadelphia; 



» Ent. News, 1901, p. 269. ' Fauna Etrusca, vol. 2. 



