234 THE CANADIAN ENTOMOLOGIST 



Myzus cynosbati Oestl. 



As already stated the species described as cynosbati by the writer* is a 

 different species. The accompanying figures (fig. 6, a-f) were made from the 

 type sHde through the kindness of O. W. Oestkmd. The type sHde is labeled 

 "17/86" and bears dissected winged viviparous female. Antennal segment III 

 bears 50 and 53 sensoria, respectively, (two antenna? on slide) irregularly placed 

 the entire length of segment, segment IV 22-24 sensoria, V with 3 and the 

 usual distal one. One of the wings on the slide is deformed, having the dis- 

 coidal vein only once branched; the other wing with the second branch notice- 

 ably nearer apex than where first branches. Head mounted on side and view 

 of tubercules not obtainable. Cornicles Myzus- like, imbricated at tip, slender 

 and relatively short. Cauda also short as shown in figure 6e. Legs rather 

 long. vSensilla of antenna? slightly swollen at tip but very inconspicuously so. 



Myzus cynosbati we have collected on flowering currant (Ribes aureum) 

 at Oak Park, 111., June 23, 1909. 



A species closely related which may prove a synonym of cynosbati was 

 described by J. Troop as Aphis houghtonensis^ . We have had the opportunity 

 to examine the type slide of houghtonensis through the kindness of A. C. Baker. 

 The types differ from the types of cynosbati by having fewer sensoria on seg- 

 ments III and IV of the winged female, having 25 to 28 on III and 2 to 7 on 

 IV, while cynosbati has 50 to 53 on III and 22 to 24 on IV. Also the antennal 

 sensilla are conspicuously knobbed in houghtonensis and only slightly so in 

 cynosbati. (See figure 6, g to m). However, we have seen specimens sent us 

 by R. H, Pettit collected on gooseberry which show all variations between the 

 types of these two species. Further study and breeding work seems necessary 

 to settle the question of synonymy in this case. 



Myzocallis alnifoliae Fitch. 



The species referred to by the writer under the name Callipteriis alni Fabr.'' 

 should be alnifolice Fitch according to Baker's key^. 



Saltusaphis elongata Baker. 



The original description of this aphid was for the oviparous females only^. 

 In the writer's collection is a slide of this species bearing a number of apterous 

 viviparous females collected by J. G. Sanders on Scirpus sp. at Madison, Wis., 

 July 13, 1912. It readily runs to elongata in Baker's key^'' and differs from the 

 oviparous female only slightly as follows: Hind tibia not swollen nor bearing 

 sensoria; antennal measurements. III, 1.34; IV, .65; V, .53; VI, base, .25; VI, 

 filament, .42 mm., the total length noticeably more than that of the body. 



5. Annals Ent. Soc. Amer., Vol. 2, 1919, p. 38. 



6. Ent. News, Vol 17, No. 2, p. 59-60, 3 figs., Feb., 1900. 



7. Jour. Econ. Ent., Vol. 3, p. 416, Oct., 1910. 



8. Jour. Econ. Ent., Vol. 10, p. 423, Aug., 1917. 



9. Can. Ent., Vol. 49, No. 1, p. 4, Jan., 1917. 



10. Loc. cit , p. 2. 



