162 PROC. ENT. SOC. WASH., VOL. 22, NO. 7, OCT., 1920 



specimens, June 21 and July 14). This is the species wrongly 

 identified by Kearfott as C. pruniella and so listed in the New 

 Jersey list. It is very close to C. sacramenta Heinrich. In fact, 

 for a long time I thought that the California pest on cultivated 

 plum might be our eastern wild cherry feeder that had been car- 

 ried west on nursery stock. The cases of the two, however, are 

 enough different to forbid us placing them under one name with- 

 out more definite evidence. In the adult of atlantica the dark 

 shadings on the under side of the antannal tuft and at the outer 

 margin of the apical cilia of the forewings are paler than those of 

 sacramenta . 



The larvae feed externally on the leaves of the wild cherry and 

 during April and May their cases are quite abundant locally 

 about Washington. The case is of the "pistol" type, black, with 

 the flaps rather small and closely appressed; the mouth deflected 

 to about 45 degrees and the posterior end evenly rounded giving 

 the "pistol handle" a rather small and tightly curled appearance; 

 length of case 6 to 8 mm. 



BUMBLEBEES OF DISTRICT OF COLUMBIA AND VICINITY. 



(Hym., Bremus.) 

 BY L. O. JACKSON. 



The region covered by this paper is the same as that of several 

 local lists on the fauna and flora of the District of Columbia and 

 vicinity, being the area within a radius of fifteen miles from the 

 Capitol. Great Falls and Mount Vernon, Va., are about the 

 northern and southern, and Beltsville, Md., and Dunn-Loring, 

 Va., the eastern and western limits, respectively. 



This list comprises records of several years collecting in this 

 locality and contains a key for the separation of the species found 

 here. Under the annotated list will be found the records of 

 earliest and latest date of capture of each sex of the several 

 species. In this connection the observations of another writer 

 on one of the included species may be of interest. 



Frison 1 says that at Champaign, 111., auricomus queens began 

 to fly about the 12th of May. Under artificial breeding condi- 

 tions the first worker emerged July 20, with five more by July 25. 

 Under more natural conditions the preceding year, a worker was 

 found June 24, and "judging from the - - appearance of the 



worker, the worker had only recently appeared." In the last 

 paper cited, the first male emerged July 22. With us, the earliest 

 record for queens is April 6, with several for the end of April 

 (28-30), and the first collected record for males is July 14. 



1 T. H. Prison. Ann. Ent. Soc. Am., Vol. XI, 1918, p. 43. 



2 Ibid., Vol. X, 1917, p. 278. 



