JOURNAJL OF ENTOMOLOGY AND ZOOLOGY 197 



tunity has been afforded to study the life history and to determine 

 if other forms appear earher or later in the season. Specimens 

 were sent to Mr. John J. Davis, who verified the above determina- 

 tion. 



Winged Viviparous Female 

 (Fig. 8) 

 The adult winged viviparous females are bright or pale-yellow 

 with dark markings on the body as indicated in the drawing. They 

 are rather small, attaining a length of from 1.5 mm. to 2 mm. and a 

 width one-third of the length. The head is slightly narrower than 

 the prothorax, light-yellow with dark-red eyes. The antenns are 

 6-articled and situated on slight frontal tubercles. Article I is usu- 

 ally the same color as the head; II, dusky-yellow; III, dusky or light- 

 yellow; IV, yellow with dusky tip; V, yellow with the apical half 

 dusky; VI, dusky. The lengths of the articles are as follows: I, 

 0.06 mm. ; II, 0.05 mm. ; III, 0.44 mm. ; IV, 0.25 mm. ; V, 0.23 mm. ; 

 VI, 0.34 mm.; total, 1.37 mm. The sensoria are circular and some- 

 what variable in number. There are usually 4 or 5 on III, though 

 the number may vary from 4 to 7. They are usually confined to 

 the basal half of the article. Article IV has none. Article V 

 usually has one near the tip. Article VI has 2 or 3 in the process. 

 The rostrum is very short reaching scarcely beyond the front coxae, 

 yellow with dark tip and very blunt. The prothorax is slightly 

 wider than the head and about the same length, yellow with a 

 prominent black vitta on each side extending to the full length 

 directly behind the eyes. Each vitta is continued on the mesothorax 

 to or slightly beyond the base of the front wing. The muscle lobes 

 are not noticeably different in color from the rest of the thorax. 

 The legs are the same color as the body with the following excep- 

 tions: the front tibiae and tarsi are dusky, the tips of the middle 

 tibia? and tarsi and of the hind tibicE and tarsi are also dusky. The 

 abdomen is yellow with two prominent and one indistinct dark 

 tubercle on the dorsum in line with and just in front of each cornicle. 

 There are also red spots on the dorsum of some individuals. The 

 cornicles are short, as wide at the base as the length, light-yellow 



