292 



FRED. V. THEOBALD. 



16. Myzus pterisoides, sp. nov. (fig. 15). 



Alate viviparous female. — Dark in colour, with deep reddish abdomen, as seen 

 in spirit specimens ; some seem to be all black ; some appear as if greenish and 

 paler beneath. Mounted in balsam, the head and thorax are black ; the abdomen 

 garnet red. Antennae dark ; longer than the body, the sixth segment paler than the 

 rest ; basal segment wider and longer than the second ; third longer than fourth 

 to almost the same length, with 7-9 round sensoria on the basal half ; the third from 

 the base being usually smaller than the rest ; fourth a little longer than fifth ; 

 sixth as long as 4 -f- 5. Eyes very large, dark ; median ocellus prominent. 

 Proboscis reaching to third coxae, in a few even just beyond and in others scarcely 

 to them ; the last two segments nearly equal. Legs rather long and thin, dark ; 

 tibiae paler, except at apex. Cornicles black, long, thin, cylindrical, slightly swollen 

 in the middle or nearer the apex ; faintly imbricated ; with a few transverse striae 

 apically, almost of reticulate nature, shorter and thicker than third antennal segment 

 to nearly the same length. Cauda small ; pale to pale dusky ; bluntly acuminate, 

 spinose, with three hairs on each side, curved apically ; the small cauda is very 



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Fig. 15. Myzus pterisoides, sp. n. : A, head ana antenna of aiate $ ; 

 B, cauda and cornicle ; C, wing ; D, nead and antenna of apterous $. 



markedly shorter than the long cornicles ; in some specimens they appear as if dull 

 smoky yellow. Hairs of head and body short and rather blunt. Wings normal ; 

 with dark veins, the membrane being tinged very narrowly on each side of the veins 

 and slightly more markedly so where they join the border ; stigma smoky. 

 Length, 16-2 mm. 



Apterous viviparous female. — Dark ; some paler beneath. Antennae longer than 

 body ; basal segment slightly longer and much broader than the second ; third 

 longer than the fourth, but shorter than the sixth, with 3-4 round sensoria near the 

 base ; fourth longer than the fifth ; sixth as long as 4 -f 5. Eyes large and apparently 

 dark. Proboscis reaching to third coxae ; in a few beyond and in some just cephalad. 

 Cornicles black ; cylindrical, but irregularly swollen to a slight extent ; about as 

 long as the fourth antennal segment ; faintly imbricated and slightly expanded 

 basally. Cauda paler ; small, spinose, with three hairs on each side, pale and curved 

 -and more or less closely appressed to the cauda. Legs long and thin ; dark, except 



