48 Psyche [April 



Wahlgren, Ent. Tidskr. xxxi. 47, f. 3 (1910); 

 Frey, Acta Fenn. xxxvii. (3) 8 (1913) 



imperfecta Loew 



Loew, Berl. Ent. Zts. ix. Cent. vi. 82 (1865) Platyr.nema 

 Aldrich, Cat. Dipt. 342 (1905) ? Platycnema. 



NOTES ON THE BIOLOGY OF CERTAIN WASPS OF THE 

 GENUS ANCISTROCERUS (EUMENID.E)i 



By Lelaxd H. Taylor. 



During the summer of 1921, while attempting to get some 

 material for the study of the biology of the Chrysididae, I was 

 able to make some fragmentary observations on three species of 

 Eumenidse which I present here. 



The biology of various species of Eumenids has received 

 much attention from both European and American observers, 

 whose work cannot be reviewed in this paper. Particular men- 

 tion should be made of the observations of Fabre (1882, 1884, 

 1891), Ferton (1895, 1901-1921) and Roubaud (1916) among 

 Europeans, and of the studies of such American workers as the 

 Peckhams (1900, 1905), Hartman (1905), Hungerford and 

 Williams (1912), Isley (1913) and the Raus (1918). With the 

 exception of Ancistrocerus capra cle Saussure, the species of 

 Eumenidse treated in this paper have not been studied, and it 

 is hoped that these notes, if presenting nothing particularly 

 new, will help to confirm previous observations on this highly 

 interesting group. 



The species which I have been permitted to observe are 

 apparently those which are usually accustomed to nesting in 

 suitable cracks and crevices of stone and wooden walls. Under 

 ordinary circumstances, therefore, their workings are practically 

 inaccessible, but by the use of artificial nesting places^ it has 



iContributions from the Entomological Laboratory of the Bussey Institution, Harvard 

 University. No. 198. 



2Both solitary wasps and bees have been induced by other investigators to nidificate in 

 tubes of glass. See the papers of Fabre (1884) and Bordage (1912). 



