6 John June Davis 



antennae of one of the winged are sufficiently distinct to make 

 out the sensoria, and on segment III of these two antennae are 

 5 and 6 sensoria, respectively, in a row. Camera lucida drawings 

 of the head, antenna, wing, hind tarsus, and cornicle of the 

 winged viviparous, and the antenna of the wingless viviparous 

 are shown on Plate I, figs. 5-9. 



22. L. rileyi Williams. 



The only specimens of this species preserved by Williams are 

 in the U. S. National Museum and it has been impossible to 

 secure these for examination. The description is too incomplete 

 to place it with certainty. It agrees in many respects with a new 

 species described in manuscript by the writer, our species being 

 identical with one listed by Professor Gillette^ as Lachnus agilis 

 Kaltenbach. 



23. Pemphigus attenuatus Osborn and Sirrine (Lachnus ? smilacisn.sp.) . 



24. Chaitophorus bruneri Williams. 



" Chaitophorus bruneri n. sp. No. 25. On Populus tremu- 

 loides, War Bonnet Cr., 6/21, '90." 



Only wingless viviparous females on the slide. Camera lucida 

 drawings of the head, antenna, style and cornicle of the wingless 

 viviparous female are given on Plate II, figs. 12-14. 



25. Ch. cordatae Williams. 



Types only in the U. S. National Museum, and I have had no 

 opportunity to examine them. 



26. Ch. viminalis Monell (Ch. nigrae Oestlund). 



Mr. Williams speaks of this species {nigrae) as being a pos- 

 sible variety of viminalis. I am of the opinion that it is a syno- 

 nym of viminalis. 



27. Ch. populicola Thomas. 



28. Ch. viminalis Monell (Ch. salicti Schrank). 



"Chaitophorus salicti Schrank. No. 34. (Self) On Salix, 

 Ashland, Oct. 10, 1890." 



This slide bears one winged male, several wingless viviparous 

 and wingless oviparous females. The other slide (No. 33) bears 

 ^Journal of Econ. Ento., 2: 385, Dec, 1909. 



258 



