( Ivi ) 



being normal green ones. These examples, all from S. Devon 

 parents, were kept in warm rooms, and though sluggish in 

 cold weather, the larvae never entirely ceased feeding; they 

 all seem undersized, and have evidently fed up to maturity 

 prematurely. The colour of the pupae of between twenty 

 and thirty examples, reared several years ago from Isle of 

 Wight parents, was in every case the typical light green. 



Lice and Trench Fever. — Mr. Bacot gave the following 

 account of experiments as to the distribution of trench fever 

 by lice : — 



That this disease is spread by lice has been generally sus- 

 pected since the second year of the war, and several isolated 

 experiments have been recorded in which the infection has 

 apparently been conveyed by lice that had recently fed on 

 patients suffering from the disease. The number of instances, 

 however, was too small and the conditions not definite enough 

 to constitute a proof. Now, however, the work of the War 

 Office Trench Fever Committee in this country, as well as 

 that of the Joint American-British Committee working in 

 France, has definitely proved that the disease is actually 

 conveyed by the body louse (Pediculus humanus). 



In England two volunteers allowed lice that had been fed 

 on patients suffering from trench fever to feed upon them 

 three times a day over a period of one month. The bites 

 received were about 500 per day. Neither of them con- 

 tracted the disease, but five volunteers, one of whom allowed 

 infected lice to be crushed on a scarified skin area, and four 

 who allowed the excreta of infected lice to be rubbed over a 

 scarified patch of skin, suffered from the fever. In France the 

 disease has been conveyed to a number of American volunteers 

 by lice, but the method adopted differed somewhat from that 

 employed here, and it is not possible to say with certainty 

 whether the infection resulted from the bites or contact of 

 excrement with abraded skin. 



Androconia in Orders other than Lepidoptera. — The 

 Kev. F. 1). Morice inquired whether androconia] scales were 

 known in insects other than Lepidoptera. He thought that 

 he had discovered them among the Sawflies in the Australian 

 genus Perga in one species of which there was on the underside 



