1881.] 117 



Mr. Billupa exhibited six Ichneumonidce new to Britain, including Lissonota 

 aneuris from Weybridge, Lissonota anomala from Wickham, Limneria litoralis from 

 Woking, Pezomachus xylocliopliila from Kainham, and Pezomachus geochares from 

 Deal. 



Sir S. S. Saunders exhibited larvse of the Dipterous parasite of the locusts of the 

 Troad, and read a letter from Mr. Calvert, from which it appeared that the locusts 

 had been entirely destroyed by these parasites throughout an area of 80 square 

 miles ; the Dipterous parasites were themselves subject to the attacks of a parasite 

 of the family Chalcididce. 



Mr. C. O. Waterhouse exhibited a common house-mouse from Peru, from a 

 large swelling on the side of which had been obtained a larva of one of the (Estridce. 

 Mr. Verrall observed that no instance had been previously recorded of any (Estrus 

 attacking the house-mouse. Mr. Waterhoiise also exhibited three new species of 

 Coleoptera from Sumatra. 



The President exhibited specimens of Charoeas graminis, received from Mr. F. 

 S. Mitchell of Clitheroe ; they had been bred from the larvae which had swarmed 

 so in that neighbourhood (see ante p. 39). 



The following papers were read : 

 Dr. Baly, " Descriptions of uncharacterized species of Eumolpidoe." 

 Mr. A. G-. Butler, " List of Butterflies collected in Chili by Thomas Edmunds." 

 Mr. C. O. Waterhouse, " Descriptions of some new Coleoptera. from Sumatra." 



A COMPARISON OP THE PTEROPHORI OF EUROPE AND NORTH 

 AMERICA, SUGGESTED BY LORD WALSINGHAM'S " PTEROPHOR- 

 ID.E OF CALIFORNIA AND OREGON." 



BY K, C. R. JORDAN, M.D. 

 (continued from page 76 J 



To pass to the next genus, Amblyptilus, a pretty new species with 

 a white ground to the wings is described under the well-chosen name 

 of Amblyptilus pica ; and cosmodactylus is described as very common 

 and very variable. In England cosmodactylus is certainly quite dis- 

 tinct from the acantlwdactylus o£ Hiibner, which is a much more 

 abundant insect, and by no means very variable. I must, in some 

 years, have seen fifty specimens in an afternoon on Ononis, near the 

 Warren at Dawlish, and all of them with the rich reddish hue on the 

 forewings, utterly different from the almost greenish tint of cosmo- 

 dactylus. The larva of acantlwdactylus feeds on strongly smelling 

 plants of various Orders : Ononis, Pelargonium, Stacliys, and others ; 

 cosmodactylus generally affects the columbine ; on the Continent, 

 intermediate forms seem to occur. Our author, from the figures, did 

 not meet the true acantlwdactylus in his travels. 



Of the pretty but difficult genus, Oxyptilus, four species are 

 recorded, one of which only is new ; one, O. periscelidactylus (not met 



