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THE ENTOMOLOGIST. 



Vol. LL] FEBEUAKY, 1918. [No. 657 



NOTES ON NEW AND LITTLE KNOWN BRITISH 

 APHIDES. 



IV. 



By Fred. V. Theobald, M.A., F.E.S., etc. 



Genus Trimcaphis, nov. gen. (Fig. 1). 



Body globular to oval. Segments marked. Cornicles absent. 

 Head more or less flattened in front. Antennae very sbort and thick, 

 of four marked segments ; the first three nearly equal in length, the 

 third may be very slightly the longest ; fourth the longest of all, with 

 a very small blunt nail or flagellum. Legs very stumpy and thick ; the 

 tarsi of only one segment as in Tetraneura, ungues bifid. Proboscis 

 short. Cauda very small and rounded. Numerous glands on the 

 body dorsally. 



Found on mosses. It cannot be placed in any described 

 genus, and its four segmented antennae and single tarsi, its 

 short, thick, stumpy legs and antennae should easily separate it. 

 So far, a single species only occurs. 



29. TruncapJiis newsteadii, nov. sp. (Fig. 1). 



Aptero7is viviparous female. — Pallid ; the legs and antennae brown ; 

 in some mealy matter exudes from the glandute on the dorsum, 

 especially apically. Globular to oval, the segments well marked. 

 Antennae very short, scarcely longer than the femora ; basal segment 

 about as long and thick as the second, each with a marked lateral 

 short hair near the apex; third about the same length, narrowed 

 basally, with a large apical sensorium ; fourth the longest, about as 

 long as 2 and 3, with a very small blunt "nail" or flagellum, with 

 three short, spinose, apical hairs and a large, round sensorium at its 

 base. Head more or less flattened, with a single short hair on each 

 side in front and showing a median siilcus. Eyes minute. Pro- 

 boscis brown, thick, reaching to the third cox^ ; the apical segment 

 acuminate, narrower and slightly longer than the penultimate. Legs 

 thick and stumpy, slightly hirsute and projecting from the body to a 

 various extent ; tibiae nearly as long but slightly narrower than 

 femora ; tarsus composed of one thick, blunt segment ; ungues 

 double. Cauda small, rounded, with two small, marked hairs ; 

 scarcely projecting. Dorsal apical segments of body with round 

 glandulae in groups {vide Fig. 1 c). 



Length, -9 to 1-2 mm. 



ENTOM. — FEBRUARY, 1918. D 



