64 ENTOMOLOGICAL NEWS. [Feb., 'l/ 



Myzocalis hyalinus Mon. (?). 



Alate viviparous female. General color pale. Length of body exclusive 

 of style 3.2 mm. Wing expansion 3.5 mm. Head pale, width between 

 the eyes .3 mm. Eyes prominent, black. Beak short, tip slightly dusky 

 and lying between the first and the second coxa. Antenna pale except 

 dusky rings near the joints of III, IV, V and VI including spur. Ar- 

 ticle III provided with about 6 large circular sensoria near the base. 

 Prothorax pale, smallest width .4 mm., greatest width, which is nearer 

 to mesothorax, .7 mm., length .4 mm. Mesothorax pale, with muscle 

 lobes orange ; width, .95 mm. Legs with dusky spot at the base of tibia, 

 tarsi dusky, rest pale. Abdomen pale, very much inflated. Cornicles 

 pale, slightly longer than wide at base, somewhat constricted at middle, 

 length about .1 mm. Style pale, tip rounded, with spines about .25 mm. 

 long. Anal plate pale, deeply bilobed, provided with long spines. 



Nymphs. As far as the writer's observations go, nymphs of this spe- 

 cies were not shaded with green as in the case of related species. 



Locality University of California campus, Berkeley, Cali- 

 fornia. Latest date of collection July 28, 1916. Host 

 Querms sp. 



The writer has had opportunities to examine several hun- 

 dreds of Aphid species, but never observed such a numerical 

 variation as presented in this species. The following measure- 

 ments obtained with specimens collected on the same day at 

 one and the same niche will illustrate this statement : 



Numerical variation in M. hyalinus Mon. in millimeters. 



Specimen No. i No. 2 No. 3 No. 4 



Length of body including style 3.7 2.9 2.4 1.75 



Width of abdomen 1.4 1.3 .9 .8 



Wing expansion 3.5 3.6 3.2 3.5 . 



Length of antennal joint III 95 .9 I. .8 



Length of antennal joint IV 7 .9 .8 .6 



Length of antennal joint V 6 .75 .6 .5 



Length of antennal joint VI 27 .35 .25 .29 



Filament 27 .40 .25 .23 



Thus in my specimen the spur is not absolutely longer than 

 the base. I am not as yet sure whether this is true liyaliuus 

 Monell or not. 



EXPLANATION OF PLATE VII. 



Figs, ii to 18, Myzocalis ivoodrvorthi n. sp. n, Alate viviparous fe- 

 male; 12, nymph; 13 to 16, the antennal articles of the alate viviparous 

 female; 17, cauda, 18, cornicle of the alate viviparous female. 



