REPORT OF THE STATE ENTOMOLOGIST I914 197 



Key to species 



11 to 15 antennal segments 

 b 1 1 antennal segments 



c Abdomen and the antennae with its sessile segments fuscous yellowish 



caudata n. sp., C. 1381 

 b 12 antennal segments 



c Abdomen yellowish; antennae light brown, the segments subsessile, the 

 second and third tarsal segments more or less dilated; male 



a z a 1 e a e Felt, C. 48 



bb 13 sessile or subsessile antennal segments 



c Abdomen and antennae dark brown; male aceris Felt, C. 66a 



cc Abdomen reddish brown, the fifth antennal segment with a length one- 

 half greater than its diameter; ovipositor one-fourth the length of the 



body ; female virginiana Felt, C. 80 



ccc Abdomen reddish brown, the fifth antennal segment with a length twice 

 its diameter; ovipositor as long as the body; female 



balsamifera Felt, C. 146 



bbb 14 antennal segments 

 c Posterior tarsi normal 



d Antennal segments sessile 



e Abdomen reddish brown, the fifth antennal segment with a length 

 twice its diameter, the fourth palpal segment one-half longer than 

 the third; ovipositor one-fifth the length of the abdomen 



e 1 e c t r a Felt, C. 50b 



ee Abdomen bright red, the fifth antennal segment with a length two 



and one-half times its diameter, the fourth palpal segment a 



little longer than the third; ovipositor as long as the body, female; 



reared from elm buds and folded leaves 



ulmi Beutm., C. 1239, ai683 

 dd Antennal segments subsessile, the fifth with a stem one-fourth or one- 

 third the length of the basal enlargement 

 e Third vein uniting with costa well beyond the apex . 

 / Abdomen pale yellowish, the fifth antennal segment with a stem 

 one-fourth the length of the basal enlargement; male 



t h a 1 i c t r i Felt, C. 98 

 ee Third vein uniting with costa just beyond the apex 

 / Abdomen bright red; ovipositor short; female 



s o c i a 1 i s Felt, C. 97 

 // Abdomen yellowish or fuscous yellowish; ventral plate of the male 

 deeply and roundly emarginate distally; the female with the 

 ovipositor as long as the body ; reared from rolled violet leaves 



violicola Coq., C. ai346 

 /// Abdomen yellowish ; ventral plate of the male deeply and triangu- 

 larly incised; female with ovipositor as long as the body; reared 



from ash leaves fraxini n. sp., C. ai84i 



ddd Antennal segments plainly stemmed, the fifth with a stem as long as 

 the basal enlargement 

 e Abdomen reddish orange; ventral plate broadly and roundly emargi- 

 nate; reared from partly folded elm leaves. ...ulmi Beutm., a 1683 



