REPORT OF THE STATE ENTOMOLOGIST I918 I77 



characteristics, while as earHer stated, there has been a wide diver- 

 gence of opinion as to species which should be grouped under 

 Cecidomyia. 



The generic characters of Itonida must be found in its type, 

 Tipula pini DeG. The following are the essential characters 

 which we have been able to glean here and there from keys and 

 published descriptions of this insect. 



Antennae with fourteen segments, the flagellate of the male bino- 

 dose, the nodes distinctly unequal. Circumfila well developed. 

 The palpi are quadriarticulate, the three distal segments subequal. 

 The wing, as illustrated by Rubsaamen, has subcosta uniting with 

 costa before the basal third, the third vein joining the margin well 

 beyond the apex, the fifth uniting with the posterior margin at the 

 distal third, its branch near the basal third. Kieffer states that 

 costa is interrupted behind its union with the third vein. The 

 pulvilli are longer than the claws and the dorsal and ventral plate 

 of the male genitalia deeply bilobed. The ovipositor of the female, 

 as illustrated by Rubsaamen, is rather long, stout, the terminal 

 lobes long, narrowly oval, distinctly contracted basally, the minor 

 lobes short and stout. 



This genus, as at present restricted, comprises a large number of 

 midges having simple claws, the third vein uniting with costa beyond 

 the apex and not presenting characters peculiar to the preceding 

 genera. The species placed here appear to live largely in leafy 

 tissues. 



Key to species 



a Ventral plate long 



b Ventral plate broadly and roundly emarginate, the lobes diverging strongly 

 c Fifth antennal segment having the basal portion of the stem with a 

 length less than its diameter, the circumfila indistinct or 

 wanting 



d Abdomen fuscous yellowish, length .75 mm, fifth antennal segment 

 with the stems one-half and two and one-half the length of 



their diameters infirm a Felt, C. 299 



dd Abdomen yellowish brown, length .75 mm, fifth antennal segment 

 with the stems three-fourths and one and one-fourth the length 



of their diameters paucifili Felt, C. 297 



cc Fifth antennal segment having the basal portion of the stem with a 



length greater than its diameter, the circumfila distinct 



d Abdomen pale yellowish, fifth antennal segment with the stems 



nearly equal, each about three and one-half times the 



diameter 



e Length 1.5 mm; dorsal plate triangularly emarginate, the 



lobes broadly truncate 



americana Felt, C. 420, a 694 



