REPORT OF THE STATE ENTOMOLOGIST 1918 177 
characteristics, while as earlier 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. Circumila 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 
fhemdiameters. .0....2..oc0e8 me infirma 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......-.--+ssersece etter estes 
americana Felt, C. 420, a 694 
