320 HYMENOPTERA. 



cerning this in the original description oi psecas (in reference 

 to the females alone). However (females) the two species 

 differ as follows : psecas has the fore wings more graceful, 

 narrower and not quite so long as in ^^ elegans" (for instance 

 while I can see the discal ciliation of the fore wings of 

 '"elegajis" through a hand lens — triple aplanat. 25 mm., 

 Bausch and Lomb — through the same lens it is not differen- 

 tiated from the general wing surface in the case of psecas) ; 

 in psecas, the first funicle joint of the antenna is distinctly 

 longer than the second (the second distinctly longer than the 

 first in " elegans") ; of the three distal funicle joints in psecas, 

 the intermediate one is the shortest, in '' elegans'" the longest 

 of the three (about thirty longitudinal lines of discal ciliation 

 in '^ elegans'\ in psecas about twenty-five, at the widest por- 

 tion of the blade); the males of the two species are very 

 similar ; however in psecas the posterior wings lack any mid- 

 longitudinal discal ciliation with the exception of two or three 

 at apex, whereas in " elegans'\ there are ten or fifteen irre- 

 gular cilia ; the fore wings, of course, are also broader as in 

 the females. The male body and antenna are colored as in 

 the female. The two species may be identical but deserve 

 to be separated until more material has been studied ; they 

 must be closely allied and seemingly are the same thing, 

 showing environmental variation, like the closely related 

 native species of neighboring islands. 



The following additional specimens : One male specimen 

 captured at Mattoon, Illinois, July 16, 1910, on stable win- 

 dows ; a female taken in the same place at the same time ; a 

 female found on a tag in the United States National Museum 

 collections labelled "From Webster. 4^*^ Unique"; also 

 finally a female from the same collection bearing no data. 

 Thus far it has been found only at Urbana and Mattoon, 

 Illinois.* 



* Subsequently, in the collections of the Illinois State Laboratory of 

 Natural History, another headless specimen (female) recognized by its 

 color and fine discal ciliation of the fore wing ; this was on a tag num- 

 bered 1418 and was collected under mulch in a strawberry field, 

 Normal, Illinois, March 27, 1884 (F. M. Webster). 



