18 ENTOMOLOGICAL SOCIETY 



Mr. Burke exhibited specimens of Boros unicolor Say, 

 a beetle belonging to the family Pythidae, which had been found 

 by Mr. R. W. Van Horn on January 21, 1908, under the dead 

 bark of Pinus virginiana at Glen Echo, Md. Mr. Schwarz 

 said that this species belongs to the Boreal fauna and so its 

 occurrence in the locality is only temporary. It probably comes 

 down the Potomac River or by railroad with logs. Mr. Barber 

 disagreed with this, because he had found the species several 

 times at quite a distance from the river and railroads. 



Dr. Hopkins presented a note on a scolytid beetle, Ips 

 (Tomicus} decretus Eichh., living in bark saturated with sea 

 water, stating that while at Virginia Beach, Va., last November 

 he found two pine logs on the sea beach which had been cast 

 up by the waves. The bark on both of them was only partially 

 dead and was found to be infested with broods of the bark- 

 beetles. One log was found on November 20, which had cer- 

 tainly been cast up within a day or two ; the other, found on 

 the 28th, had been cast up during a storm on the 24th, or at 

 least it was known that it had not been on the beach in that 

 vicinity at any time within ten days previous to that date. The 

 bark of both logs was thoroughly saturated with sea water 

 when found, and repeatedly soaked by the tides. All stages 

 of the insect were found in large numbers in the bark, and 

 the matured adults were emerging and crawling about on 

 the surface of the wood and bark. It was very evident that 

 these logs had been floating about in the sea for some time be- 

 fore they were cast up by the waves and that the broods of the 

 barkbeetles had been able to survive. It is evident that the 

 parent beetles entered the bark and deposited their eggs before 

 the logs got into the water, or possibly after they had been in 

 the water and at a time when they were temporarily on the 

 beach, since it is not likely that the beetles could enter the bark 

 while the logs were in the water. When it is considered that 

 it requires about thirty days for the broods of the barkbeetles 

 to develop, it is evident that this or a longer period had elapsed 

 since the logs were first infested. This power of a barkbeetle 

 to live in water-soaked drift logs is of interest in showing their 

 power of resistance to such conditions and how a species may 



