REPORT OF THE STATE ENTOMOLOGIST I9I3 87 



cc Stem of the fifth antennal segment one-half the length of the 

 basal enlargement 



d Length 2.5 mm ; harpes rounded distally 



absobrina Felt, C. 40 

 ccc Stem of the fifth antennal segment with a length three-quarters 

 that of the basal enlargement 

 d Length 2.5 mm; ventral plate long, narrowly and deeply 



incised; reared from gouty gall on willow twig 



batatas Walsh, a686, aii02, auo8 

 dd Length 2 mm; ventral plate long, deeply and roundly 



emarginate; reared from slender willow twigs 



c a u 1 i c o 1 a Felt, C. ai822 



ddd Length 2 mm; ventral plate broad, deeply and roundly 



emarginate; reared in jar containing Schizomyia 



p o m u m galls on grape 



hirticornis Felt, ai940, ai94i 

 cccc Stem of the fifth antennal segment as long as the basal enlarge- 

 ment 

 d Length 1.5 mm; ventral plate long and broadly rounded 

 distally; reared from pouch fold gall on Spiraea leaf.... 



s a 1 i c i f o 1 i a Felt, ai505 

 aaaa2i or more antennal segments 



b Females, segments sessile or subsessile 



c Length 4 mm; 22 to 23 antennal segments, the fifth with a 

 length twice its diameter; abdomen dark reddish brown; 



reared from inconspicuous swellings on willow twigs 



podagrae Felt, ai399, aio;6y 1 

 cc Length 5 mm; 26-29 antennal segments. Reared from clustered 



rosette gall on dwarf willow 



rhocloides Walsh, C. 1247, 77S-77 



ccc 25 to 26 antennal segments; lateral whitish tufts on abdomen 



usually well marked; lobes of ovipositor oval with a length 



twice their breadth; reared from pine cone gall on willow 



strobiloides Walsh 



cccc 24 antennal segments; the lateral tufts on abdomen not well 



marked ; lobes of ovipositor long, narrowly oval, with a length 



two and one-half times the width ; reared from leafy rosette 



gall on willow brassicoides Walsh 



bb Males, antennal segments stemmed 



c Stem of the fifth antennal segment with a length three-quarters 



that of the basal enlargement, males 



d 23 antennal segments ; the fourth palpal segment one-half 



longer than the third; apical processes on harpes short, 



broadly rounded ; length 4 mm ; lateral tufts on abdomen 



well marked; reared from pine cone gall on willow 



strobiloides Walsh, aii73, ai340, ai442, C 1248 



1 We have placed Rhabdophaga cornuta Walsh here provisionally 

 owing to the similarity of the galls. 



