Vol. xxix] ENTOMOLOGICAL NEWS 359 



1918, 301-4. Thompson, C. B. Dual queens in a colony of honey 

 bees. 68, xlviii, 294-5. 



BeutenmuJler, W. New species [4] of Rhodites from Oregon. 4, 

 1918, 305-9. Crawford, J. C. [Ten] new H. 102, xix, 165-72. 

 Cushman, R. A. Two new chalcids from the seeds of Amelanchier. 

 102, xix, 79-86. Malloch, J. R. North Am. species of the genus 

 Tiphia in the collection of the Illinois natural history survey ['21 

 new]. 438, xiii, 1-24. Rohwer & Cushman Idiogastra, a new sub- 

 order of H., with notes on the immature stages of Oryssus. 102, 

 xix, 89-99. 



Doings of Societies. 



Entomological Section of The Academy of Natural Sciences of 



Philadelphia. 



Meeting of May 23, 1918. Director Philip Laurent presiding, twelve 

 persons present. 



Lepidoptera.- Dr. P. W. Whiting, of the University of Pennsyl- 

 vania, made an interesting communication on his genetic researches 

 with the common flour or grain moth, Epkcstia kuhni^lla. He found 

 that there was quite an extension in the hatching of a single laying 

 over a period varying from two to three months. The moth in its dif- 

 ferent stages is verv susceptible to temperature and humidity, the best 

 results in the rearing being obtained in a high temperature and humid- 

 ity ranging near go per cent. There were three distinct types found 

 in the course of breeding: a typical, nearly uniformly grayish brown 

 form, a "black-shouldered" form having black areas at the bases and 

 apices of the primaries, and an entirely black form. The degree of 

 development of the adult mouth parts varied considerably, in some 

 cases being almost wanting. There were also some noticeable malfor- 

 mations in the genitalia, and a few cases of intersexes were noticed. 

 The ravages of a coccidian, a protozoan parasite, which proved very 

 destructive among the larvae, wiping out whole colonies, necessitated 

 thorough sterilization of the apparatus and media. Another parasite 

 of the larva was a hymenopteron, a species of Habrobracon, and the 

 study of its life history and variations gave some very interesting re- 

 sults. The communication was illustrated by drawings and series of 

 the bred moth material. 



Diptera.- Mr. Hornig exhibited specimens of Aedcs, sqttainiiier Coq. 

 as a new record for Philadelphia. He stated that two to three days 

 elapse between emergence and the first feeding. He also mentioned 

 rinding some eggs of A. triscnitus in moist dirt, not water, from a 

 crotch of a tree, a medium in which he could not imagine the larvae 

 could live. E. T. CRESSON, JR., Recorder. 



