364 ENTOMOLOGICAL NEWS. [Oct., 'l6 



month the stem mothers are mature and are producing the 

 second generation practically all of which becomes alate. The 

 spring migrants are in the pupal instar by about May 6. In 

 another three or four days the migration commences and lasts 

 until the fore part of June, a few insects becoming alate at a 

 time. Alate forms as well as apterous are produced during 

 the summer upon the roots of various grasses. Toward the 

 last of September the return migration commences and ex- 

 tends almost to the end of October. The sexes are deposited 

 as the alate forms arrive so that we have fresh migrants and 

 nearly mature sexes upon the leaves at the same time. A few 

 straggling migrants are on the trees even after the eggs are 

 being laid. The eggs, are not placed thickly upon the twigs 

 and are many fewer than would be expected from the num- 

 ber of sexes present. 



It may be mentioned that the writer was unable to rear this 

 species on the flowering dogwood, but was able to get it to 

 feed only upon the narrow-leaved dogwood which borders the 

 streams. 



Stem Mother. Morphological characters: Antennae composed of 

 either six or five segments with the following measurements : I, 0.064 

 mm.; II, 0.064 mm.; Ill, 0.176 mm.; IV, 0.064 mm.; V, (0.08 + 0.032 

 mm.), or I, 0.064 mm.; II, 0.064 mm.; Ill, 0.112 mm.; IV, 0.048 mm.; 

 V, 0.064 mm.; VI, (0.08 + 0.032 mm.). Segments armed with a few 

 stout hairs. Eyes very small; labium short extending about to the 

 second pair of coxae ; body elongate oval, with scattered hairs, length, 

 1.76 mm. 



Color Characters : General color deep reddish brown, sometimes 

 purplish or almost black. Antennae dusky; abdomen with broad trans- 

 verse bands of black. 



Spring Migrant. Morphological characters: Antennal segments as 

 follows: I, 0.064 mm.; II, 0.064 mm.; Ill, 0.208 to 0.24 mm.; IV, 0.08 

 to 0.09 mm.; V, 0.096 to 0.112 mm.; VI, (0.08 to 0.096 + 0.048 mm.). 

 Segments III to VI, covered with numerous imbrications composed of 

 rows of minute points and armed with long hairs. Segment III, with 

 2 to 4 subcircular sensoria varying from fairly large to very minute in 

 size. Segments IV and V with usually one sensorium each and seg- 

 ment VI, with one large and several small sensoria at the base of the 

 unguis. Labium moderately long, reaching to or past the bases of the 

 hind coxae. Length from vertex to tip of cauda about 1.7 mm. 



