OF WASHINGTON. 101 



by donating to each a complete set of the Proceedings of the 

 Entomological Society of Washington. These sets, the chair 

 man stated, would be forwarded free of expense to the Society 

 by the Smithsonian Institution. 



Doctor Ashmead exhibited the worker of a curious ant col 

 lected by Mr. O. F. Cook in Guatemala, Strumigenys mandi- 

 bularis Smith, a cryptocerine. Little is known of the habits of 

 these small ants, but some of them live in galleries in twigs and 

 it is not improbable that they are fungi feeders. Mr. Schwarz 

 stated that the species of Strumigenys found in Guatemala 

 lives among old leaves on the ground and that the twig-inhabit 

 ing species belong to the genus Cryptocerus. One species of 

 Strumigenys occurs near Washington, in the vicinity of 

 Bladensburg, Md., among old leaves and in very small colonies, 

 some 5 or 6 individuals only being found together. They may 

 be collected by sifting. 



-Doctor Stiles reported the occurrence of the tick Derma- 

 centor nit ens Neumann in this country. Mr. Hunter recently 

 sent to Washington specimens from Texas. This species has 

 heretofore been reported from Porto Rico and South America. 

 It occurs on horses. Mr. Schwarz remarked that if this species 

 were native to Porto Rico or the West Indies it must have had 

 some other host than horses originally, since the horse is not 

 native there. He asked Doctor Stiles whether this tick had 

 been found on any other animal, and Doctor Stiles replied that 

 it had not. Doctor Stiles stated further that while a single 

 species of ticks might be taken on several different species of 

 animals, yet in the well studied forms it would appear that there 

 is a decided predilection for some one host species. Mr. 

 Schwarz stated that a man-attacking species of tick was very 

 common in Alta Vera Paz, Guatemala, and Doctor Stiles then 

 said that this was in all probability Ornithodorus tnegnini 

 Duges. 



Mr. Barber reported having captured a specimen of Manti- 

 spa brunnea Say, a neuropteroid insect, at Jacksons Island, in 

 the Potomac River not far below Great Falls, Maryland. Al 

 though this species is recorded from New Jersey and Philadel 

 phia as well as from the Southern States, in its eastern range, 



