162 Psyche [October 



The cocoons were on trees, exposed to the natural weather con- 

 ditions of St. Louis during the winter . 



3. Telea polyphemus Cramer. 



Four larvae of this species taken in the woods spun their cocoons 

 within three or four days after being caged, and emerged as follows : 

 Sex. Pupated. Emerged. Duration. 



c? 9/19/'10 5/12/'ll 235 Days. 



9 9/22/'10 5/13/'ll 233 " 



c? 9/23/'10 5/16/'ll 235 " 



c? !) 27 '10 5/ll/'ll 226 " 



At first glance the figures above seem to show that the insects 

 emerged in the order in which they pupated, but in the fourth 

 instance we see that the individual which was the last to pupate 

 emerged as an adult before any of the others. 



It would be of interest to record similar data from year to year 

 from one or more localities, in an attempt to discover the causes 

 underlying any variation in the duration of the pupal period, and 

 to discover if the pupal duration is in any way correlated with the 

 longevity of the imago. We have found in connection with other 

 work that the pupal period of the Cecropia moth varied greatly 

 under changed conditions of temperature and moisture. 

 St. Louis, Feb. 21, 1913. 



NOTES ON VARIATION IN THE VENATION OF THE 

 SPECIES OF THE GENUS LEPTOGASTER. 



By Charles W. Johnson. 

 Boston Society of Natural History, Boston, Mass. 



In The Entomologist for July, 1913, vol. 46, p. 213, under the 

 title "A Fossil Asilid Fly from Colorado," Prof. T. D. A. Cockerell 

 proposes Tipulogaster "a new subgenus (or genus?) " for the recent 

 Leptogaster badius Loew. based on the following characters: "The 

 anal cell is narrowed apically as in L. hellii but the second pos- 

 terior cell is no more produced basally than in Cophura. This 

 also has the second submarginal cell shorter than in the typical 

 Leptogaster. while the distance between its base and the anterior 



