November — December 1888.] 



PSrCHE. 



133 



among the dense pubescence that covers 

 the under leaf surface. If the abdomen 

 terminated as does that of those species 

 which oviposit on bark, the egg would 

 often be caught on the ends of the hairs 

 and blown away. 



In order to determine the numbers of 

 eggs laid bv a single female I crushed 

 several specimens in alcohol on a glass 

 slide and counted the number of well 

 developed eggs contained within the 

 abdomen. The greatest number found 

 was 3S, and the least lo ; the otlier 

 specimens containing lo, 13, 10, 20, 15, 

 II and 13 respectively. 



Chaitophorus viminalis Monell (?). 



Mr. J. Monell has described,* under 

 the name Chaitophorus viminalis 

 wingless and winged specimens of a 

 plant louse on Salix lucida and S. 

 babylonica. No dates are given but prolr 

 ably both these forms were viviparous. 



Late in October I found sexed indi- 

 viduals of a species of Chaitophorus 

 abundant on some bushes of Salix alba 

 in the university arboretum. It was 

 evidently too late for the viviparous 

 forms, as none were foimd. Hence I 

 refer these specimens to viminalis \<i\\\\ 

 some iiesitancy. They are not C. 

 smithiae, however, as the nectaries are 

 short and thick, and Monell states that 

 in the latter they are long and flaring 

 at tlie tip, a character which places the 

 species {sm/thiae) in the genus Clado- 

 bius. 



• Winded male. 



Expanse of wings . . . 4.3 mm. 

 Width of bodv .... 0.6 mm. 



*BulI. U. S. geol. surv., vol. 5, p. 31. 



Length of body . . . 1.50 mm. 



" antennae . . 1.15 mm. 



" cornicles . . 0.05 mm. 



" Cauda . . . 0.08 mm. 



Black, somewhat shining; abdomen 

 greenish-black. Body and members 

 furnished with rather long brown hairs. 

 Antennae black, except base of third 

 joint which is brownish, with a few 

 long brown hairs. Joints I and II 

 subequal ; III long, not quite equal to 

 I V + V ; IV and V subequal ; VI short, 

 rather thick; VII long, slender, nearly 

 three times as long as VI. Cornicles 

 short, greenish-brown. Rostrum reach- 

 ing slightly back ofanterior coxae, green- 

 ish black. Legs blackish, with tibiae 

 pale brown. Cauda broad, expanding 

 from base to middle. Wing membrane 

 whitish. Tegulae and base of wing- 

 veins yellowish-brown, as are the costa 

 and cubitus ; stigma, and other veins 

 brownish-black. 



Described from one living specimen 

 taken on under leaf-surface of Salix 

 alba^ 3 October 1887. Genital organs 

 were extruded. 



Oviparotis female. 

 Length of body .... 16.5 mm. 

 Width of body .... 0.9 mm. 



Dull yellowish-brown or blackish. 

 Body and appendages furnished with 

 numerous long brown hairs. Eyes 

 dark. Antennae dusky brown or black- 

 ish, robust. Joints I and II subequal ; 

 III shorter than IV + V; IV slightly 

 longer than V, which is slightly longer 

 than VI ; VII rather thick, slightly 

 longer than III. Legs robust, dusky 

 yellowish-brown or blackish. Rostrum 

 robust, unicolorous with body, reach- 



