36 John June Davis 



115. Myzus persicae (Sulzer) (Phorodon cynoglossi Williams). 



" Phorodon cynoglossi n. sp. No. 157. On Forget-me-not 

 (Cynoglossum), Greenhouse, Lincoln, Jan. 5, 1891." 



One winged viviparous female and several wingless on the slide. 

 This is most certainly Myzus persicae (=^Rhop. dianthi). Cam- 

 era lucida drawings of the head and antenna of the winged 

 female given in Plate VIII, fig. 128. 



116. Rhopalosiphum monardae (Williams) {Phorodon monardae Wil- 



liams). 



" Phorodon monardae n. sp. Type No. 160. On Monarda 

 fistulosa, Ashland, May 24, '90." 



One winged and several wingless, apparently all immature, on 

 this slide. This species was designated as a new species in the 

 manuscript of Mr. Williams, but, probably by oversight, it was 

 not described. The following notes are taken from the single 

 winged female on the type slide, the only known existing speci- 

 men. 



Antennae longer than the body ; segment III with 7 to 10 sensoria, more 

 or less in a row, segments V and VI base with the usual distal ones. 

 Measurements of segments as follows : 



Length of wings, 2.0 mm; width, 0.95 mm; length of body, 1.45 mm; 

 width, 0.65 mm; cornicles, 0.31 mm; style, 0.13 mm (appears to be slightly 

 shrunken) ; hind tarsus, 0.08 mm. 



In the balsam specimen the antennae appear to have been black, 

 excepting the extreme base of III and all of I and II. Cornicles 

 were probably concolorous with the body and dusky at tip. Wing 

 veins dark brown and very conspicuous. Camera lucida draw- 

 ings of the head, antenna, wing and cornicle of the winged vivip- 

 arous female are given in Plate VIII, figs. 129 to 131. 



117. Microsiphum canadensis (Williams) (Cryptosiphum canadensis 

 Williams). 



" Cryptosiphum canadensis n. sp. No. 162. On Artemisia 

 ludoviciana, Fremont, July 31, '90." 



288 



