296 ENTOMOLUtllCAL NEWS [DeC, '19 



Group VIII. Similar to VI, but the spot on segment g 

 wider and reaching the apex, but not as wide as the black 



on either side of it 4 males 



Group IX. Yellow on segment 9 as wide as the Mack on 

 either side of it, segment 10 with a rounded dorsal yel- 

 low spot I male 



Referring to the dorsum of segment 10, mentioned in group IX, its 

 color in the other groups may he briefly tabulated: black in two of I, 

 eleven of II. eight of III, twelve of IV, five of V, three of VI, and one 

 of VIT; with a narrow crest or spot of yellow (often almost micro- 

 scopic) on the middorsum of segment 10, one of II, two of III, six 

 of IV, eight of V, seven of VI, five of VII. and four of VIII. 



The eleven females of crassus may be grouped as follows : 



Group I. Dorsum of segments 9 and 10 black 7 females 



Group II. Dorsum of 9 and 10 each with a small yellow 



spot, subbasal on 9, submedian on 10 3 females 



Group III. Spot on 9 prolonged as a median line to apex 



of segment, spot on 10 larger than in groups I and II... i female 



In view of this material I believe my reference in 1906, re- 

 ferred to above, to intermediates between crassus and fratcrnus, 

 should be disregarded, and I know of no evidence pointing to 

 the interbreeding of these two species. 



Several cases of the capture in couple of sexes of different 

 species have been recorded. The most unique I have encoim- 

 tered was met when I took a male Argia tibiolis flying with a 

 female Lcstes uncatus along the Aboite River, seven miles 

 southwest of Ft. Wayne, Indiana, July 6, 1919. During the 

 time they were observed before capture several unsuccessful 

 attempts at copulation were made. 



At this date Argia tibialis was abundant along the Aboite 

 River, which is only a creek eight to fifteen feet wide, while 

 Lestcs uncatus was at home in numbers at nearby small wood- 

 land swamps from one of which the female along the creek 

 had doubtless wandered. 



Annual Meetings of Entomologists. 



The annual meeting of The Entomological Society of America will 

 be held on Monday and Tuesday, December 29 and 30, 1919, and that 

 of The American Association of Economic Entomologists on Wednes- 

 day, December 31, 1919, and Thursday and Friday, January i and 2, 

 1920, both at St. Louis, Missouri. 



