'n 



1931.1 125 



Saltusaphis familiaris (Walker) (fig. 3, B, C). 



Aphis familiarls Walker, Zoologist, vi, 1848, p. 2220 (nee Theobald, 

 Ent. 1, 1917, p. 77). 



The insect standing in our collections over the name of Ajyhis 

 familiaris Walk, is a single immature specimen belonging to the genus 

 Saltusaphis Theob. It possesses the tj^pical antennae of that genus, the 

 swollen femora, and the fan-shaped hairs on the body. The cleared 

 specimen is very distinct from S. insessa. 



Female, — Antennae about | the length of the body ; proportions of seg- 

 ments, 5, 4, 15, 9, 10 {6+10); total length 1'18 mm. Head rather strongly 

 chitinised, except for a central longitudinal streak. Thorax and abdomen with 

 a series of chitinoiis areas, more or less circular, arranged roughly in lougi- i 



tudinal rows, each area having at least one fan-shaped hair; standing out 

 prominently are four rows of large areas, two medio-lateral, and the marginal ; 

 the chitinoiis areas, taken transversely, correspond to the segments which are ''Ti'M 

 very faintly visible. Cornicles situated in a heavily chitinised area. Lec/s 

 short, thick, the femora of the first and second pairs much swollen, tlie liind 

 tibiae thicker than either of the other pairs ; lengths of hind leg : femur 30 mm,, 

 tibia •48 mm., tarsus "16 mm. 



Total length 1-6 mm. 

 On Lycopsis arvensis, Fleetwood, Lancashire {Walker). 



Aspidapliis adjuvants (Walker) (fig. 4, C-E). 



Aphis adjuvajis Walker, Zoologist, vi, 1848, p. 2220. 



Aphis polygoni Walker, loc. cit. p. 2249. 



In the Canad. Ent. vol. xlix, 1917, p. 196, Grillette erected a new 

 genus, Asjjida^yhis, with type, A. polygoni Grill., found on a species of 

 Poli/gonum at Fort Collins, Colorado. The distinguishing feature 

 of the genus are the short o-segmented antennae, the weak, recumbent 

 cornicles, shorter than the hind tarsus, without flange, somewhat clavate, 

 and with the opening lateral, on the inner side, near the distal end, and 

 with the eighth tergite of the abdomen developed into a very large 

 triangular shield, which in the type species extends well beyond the end 

 of the cauda. An examination of Walker's Aphis adjiivans and Aphis 

 poli/goni reveals that they belong to this genus. All his specimens are 

 either oviparous females or apterous males. 



Oviparous Female. — "The body is granulated, elliptical, buff, tinged with 

 red ; the antennae are pale yellow, with black tips ; the legs are pale yellow ; 

 the hind tibiae are brown " ( Walker). Ante?inae a little more than one-fourth 

 the length of the body, with very few spines, the primary sensorium on 

 segment V compound ; proportions (average of 6 specimens), 15, 14, 43, 22 

 (22-t-23); total lengtli •55 mm. Rostrum reaching to the mid-coxae. Abdo^nfn 

 devoid of markings, glabrous, in potashed specimens showing slight rugosity ; 



