THE CANADIAN ENTOMOLOGIST. 227 



at Carbondale, Illinois, in August. As will be readily noticed, this 

 is not the species designated quercifolice by Fitch. 



Although apparently not a typical member of the genus 

 Symdobius, the species under consideration seems to best belong- 

 there. 



Wingless viviparous female: 



General colour dark brown. Head and prothorax brownish 

 yellow to light reddish brown; mesothorax usually concolorous or 

 but slightly darker; metathorax with a dark brown longitudinal 

 area on each side, the remaining areas greenish brown ; abdomen 

 dark brown with irregular paler greenish brown areas, apparently 

 due to the pale greenish young within the body; sometimes the 

 metathorax and entire abdomen shining dark brown, almost black. 

 Body sparsely clothed with Chaitophorus-llke hairs, more promin- 

 ent at posterior end. 



Eyes maroon colour. Antennae scarcely more than one half 

 the body length; almost naked; segment III longest, and the fila- 

 ment of VI shorter than the basal portion of that segment; only 

 the usual distal sensoria on V and base VI ; segment I and II dusky, 

 III and IV pale, with a barely noticeable duskiness at tip, V pale 

 and dusky at tip. VI, base, with the basal half pale, the distal half 

 and all of filament VI blackish (PI. XVIII, fig. 49). Beak pale 

 yellow, the extreme tip dusky; reaching to the coxae of the second 

 pair of legs. Two fore pairs of legs whitish, the joints often dusky 

 and the distal half of tarsus blackish; hind pair blackish, excepting 

 the distal half of tibia, which is paler. In life the cornicles are 

 rather conspicuous because of their pure white colour, as though 

 covered with a heavy white pulverulence; quite small, the opening 

 narrow; slightly cone-shaped, and inconspicuous in mounted 

 specimens (PI. XVIII, fig. 50). Cauda a rather inconspicuous 

 rounded protuberance, pale yellowish and hairy; anal plate bilobed, 

 moderately deeply emarginate and the lobes robust and hairy 

 (PI. XVIII, fig. 51). 



Measurements from six individuals in balsam : Length of body 

 1.4 to 1.9 mm., average 1.6 mm.; width 0.8 to 1.0, average 0.9 

 mm.; antenna I, 0.069; II, 0.052; 111,0.191 to 0.278, average 

 0.234; IV, 0.139 to 0.182, average 0.157; V, 0.157 to 0.191, 



