2 Trans. Acad, of St. Louis 



surrounding this barn. On September 1 of the third year 

 they appeared without the slightest change in habit or 

 habitat. The vegetation surrounding the manure-heaps 

 had meanwhile been supplanted by cinders and the 

 wasps had no foliage upon which to rest; hence many 

 paused to rest on the manure-piles. Long and careful 

 watching, however, revealed none of these entering the 

 manure for prey or hosts. A few smartweeds in blossom 

 nearby afforded them food. By seven o 'clock, all had dis- 

 appeared, and efforts to locate their sleeping abode were 

 futile. In this the third year also their dissemination 

 over the field was nil. A visit to the area on October 6 

 showed that they were not to be found so late in the 

 season. 



Scolia nohilitata Fabr. [S. A. Rohwer]. Taken on the 

 flowers of buck-brush at Wesco, August 1, 1920. 



Elis atriventris Gahan. [S. A. Rohwer]. A dead speci- 

 men of this wasp was lying on the hot sand at Lake View, 

 Kansas, July 29. 



Elis quinquecincta Fabr. [S. A. Rohwer]. While I 

 have made observations on the gregarious sleeping 

 habits of the males,* I have found nothing on the habits 

 of the females excepting on one occasion in a dirt road, 

 where one made three attempts to get under some clods 

 of dirt, and under the last one she remained hidden for 

 some time. Since this species is supposed to sting and 

 oviposit in the larva of may-beetles, this may indicate 

 that she was searching for prey. This species was seen 

 feeding upon the flowers of Melilotus alba. On another 

 occasion, on July 26, a group of a dozen males and one 

 female was found sipping the nectar of these flowers. 



Elis interrupta Say. [S. A. Rohwer]. This species was 

 also on the buck-brush flowers at Wesco, August 1, 1920. 



Tiphia vulgaris Rob. [S. A. Rohwer]. This medium- 

 sized wasp was taken from the mouth of a robber-fly, 

 Proctacanthus milberti Macq. [F. Knab] on August 18. 



•Ann. Ent. Koc. Amer. 9:227-274, 1016. 



