Dec, I9I2.] Felt: Studies in Itonidid^. 247 



villi a little shorter than the claws. Genitalia : dorsal plate broad, deeply and 

 triangularly emarginate ; ventral plate broad, broadly and roundly emarginate. 

 Type Cecid 3.2264^. 



This male was reared April 15, 1912, from a jar containing numer- 

 ous larvae of Bolitophila cincrca Meign. found in the trunk of a 

 decaying birch. It is allied to /. setarice Felt, being separated there- 

 from by the short basal portion of the stem of the fifth antennal 

 segment. 



Itonida aprilis, new species. 



Male. — Length 2 mm. Antennae Yz longer than the body, rather thickly 

 haired, fuscous yellowish ; 14 segments, the fifth having the stems each with a 

 length about 2J/2 times its diameter; distal enlargement subcylindric, with a 

 length nearly twice its diameter and slightly constricted near the basal third ; 

 terminal segment, distal enlargement somewhat produced, with a length thrice 

 its diameter and obtuse apically. Palpi : first segment with a length over thrice 

 its diameter, second a little longer, broader, the third longer and more slender 

 than the second, the fourth J4 longer than the third, nearly uniformly dilated. 

 Mesonotum dark brown, the fuscous yellowish submedian lines sparsely haired. 

 Scutellum dark reddish brown, postscutellum dark brown. Abdomen sparsely 

 haired, dark yellowish brown. Wings hyaline, costa dark straw. Halteres 

 fuscous yellowish; coxae and legs fuscous yellowish, the tarsi somewhat darker; 

 claws stout, strongly curved, the pulvilli about J/3 the length of the claws. 

 Genitalia : dorsal plate short, deeply and triangularly emarginate ; ventral plate 

 long, broad, triangularly emarginate, the lobes short. Type C. 1414. 



The males described above were captured in some numbers April 

 13, 1912, at Albany, N. Y. This appears to be one of the earlier 

 spring forms and is related to /. sangidnia Felt. Nothing is known 

 concerning its life history. 



Itonida resinicola 0. S. 



Larva. — Length 6 mm., stout, tapering at both extremities, a mottled, yel- 

 lowish orange. Head skeleton, fuscous, chitinized; breastbone small, indistinct, 

 posterior spiracles borne by submedian processes, heavily chitinized apically. 



Twigs of pitch pine were collected June 5, 1912, bearing the 

 characteristic pitch masses of this midge inhabited by numerous 

 reddish orange larvae, some of which have the posterior spiracles 

 protruding above the surface of the pitch. Many, however, are well 

 within the pitch mass and apparently remain in this condition for 

 extended periods. 



The habits of this species appear to vary markedly from those 

 of I. inopis O. S., since midges of this latter species were reared 



