REPORT OF THE STATE ENTOMOLOGIST I908 



21 



quadranoriilar. fuscous area on the dorsum of the fourth, fifth, 

 sixth and seventh segments. Cornicles fuscous and taperin;; 

 shg-htly. Wings with a yellowish white stigma. Legs mostly a pale 



Fig. r Gladioliaphid, wings and antenna, much enlarged. (Original) 



yellowish, the femora and tibiae apically and the tarsi fuscous. 

 \'enter of prothorax yellowish, the mesothorax with broad, angu- 

 late. fuscous sclerites ventrally. The abdo- 

 men ventrally yellowish and deep orange, 

 the two apical segments narrowly margined 

 mesially with fuscous. The antennal seg- 

 ments have the following measurements : 

 The third .36 mm, the fourth .165 mm, the 

 fifth .105 mm and the sixth .375 mm, the 

 sensoria being very abundant on the third 

 and fourth segments; cornicles .15 x .045 

 mm. tapering gradually^ 



Life history. Gladioli bulbs are kept by growers in large 

 warehouses, the temperature being maintained at about 40 degrees 

 throughout the winter. This insect is evidently unable to breed 

 under these conditions. As spring advances and the house begins 

 to warm up in March, the aphids appear in large numbers, repro- 

 ducing so abundantly that the window frames ami sills may 

 become literally covered with wings and bodies of plant lice. It 

 is comparatively easy, in a badly infested house, to sweep up a 

 gill of wings and exuviae from under one window. This plant 

 louse multiplies freely upon the bulbs, usually being massed around 

 the origin of Ihe roots and sometimes nearly covering- the entire 



Fig. 8 Gladioli aphi ]. 

 honey tube, enlarged. 

 (Original) 



