PTYOHODES JUGLANDIS. 41 



four others on the prothorax. Abdomen furnished 

 with four longitudinal rows of squarish spots, so dis- 

 posed as to give much the appearance of transverse 

 bands. The very short cornicles are each seated on 

 one of the lateral posterior spots. Wing-cases very 

 pale, and edged with brown. Eyes red. Antennee 

 very short and tipped with brown. Rostrum hardly 

 longer than the head. Legs pale grey; hind pairs 

 very stout. The whole insect is pilose. The young 

 insects are born without wing-cases. 



Winged viviparous female. 



Large, bright yellow. Head, band on prothorax, 

 thoracic lobes, and nietathorax brown. Abdomen 

 yellow, with seven more or less interrupted transverse 

 brown bars flanked by two rows of marginal spots. 

 Cornicles very short, with their bases brown. 

 Antennse short and very slender, the seventh joint 

 being represented by an obtuse claw or nail. Legs 

 short, hairy, and stout. 



Wings small and narrow for the size of the body. 

 Costal nerve and cubitus brown ; stigma paler ; other 

 veins brown, and expanded at their apices into brown 

 cloudy stains. 



This handsome Aphis differs in several respects 

 from previously described allied forms. The short- 

 ness of the antennse and the aborted seventh antennal 

 joint, coupled with its very different shape, require its 

 exclusion from the last genus. Again, some signifi- 

 cance would attach to its modified metamorphoses, 

 and perhaps, too, from its habit of feeding exclusively 

 on the upper surfaces of the leaves of Juglans regia, a 

 habit not noticeable in Pterocallis juglandicola, the 



