Willia)iis' "The ApJiididae of Nebraska" 29 



97. Macrosiphum erigeronensis (Thomas) (Siph. erigcronensis Thomas). 



98. M. eupatorii (Williams) (Siph. eupatorii Williams). 



I have had no opportunity of studying this species since the 

 types are lost. 



99. M. euphorbiae (Thomas) (Siph. euphorbiae Thomas). 

 100. M. frigidae (Oestkind) {Siph. frigidae Oestlund). 

 loi. M. fulvae (Oestlund) {Siph. fulvae Oestlund). 



" Siphonophora fulvae Oest. No. 137. On Impatiens pallida. 

 W., Aug. 22, 1890." 



Only one wingless viviparous female on the slide. A camera 

 lucida drawing of the antenna of this wingless female is given on 

 Plate V, fig. 94. 



Another slide of this species (No. 139) which bears the same 

 data as the above mentioned slide, contains one winged and 

 several immature individuals. Notes on the winged specimen are 

 as follows: Measurements of the antennal segments: 



Mediaj (first branch of the third discoidal) branching at about 

 one half the distance from the tip to where media:,+4 branches. 

 Cornicles semi-reticulate at tip, slender, and subequal to the style 

 in length. The style robust. Camera Jiicida drawings of the 

 head, antenna, cornicle and style are shown in Plate V, figs. 91 

 to 93. 



102. M. gaurae (Williams) {Siph. gciurae Williams). 



" Siphonophora gaurae 11. sp. No. 140. On Gaura, Ashland, 

 Sept. 4, 1890." 



This slide contains three pupae, one winged, and two wingless. 

 This and the species described by Williams as gaurina, discussed 

 below, are the same, and gaurae must be considered as having 

 priority since it was described first in the paper. 



Wingless viviparous female: Antennal segment III bears 2 to 4 sen- 

 soria. Comparative lengths of III and VI filaments as follows : 



281 



