Dec, 1912.] Felt: Studies in Itonidid.e. 243 



type of gall. The tissues at this time are soft and easily torn or cut. 

 The identity of this type of gall with the more familiar form is 

 established by finding on the twigs one gall, the apical portion of 

 which was pruinose and with rudimentary needles, while the basal 

 part had begun to turn brown and assume the characteristics of the 

 mature gall, specimens of which also occurred upon the twigs. The 

 newly developing galls contain small, pale yellowish larvae scarcely 

 * mm. in length, while those on the older portions of the stem are 

 inhabited by reddish orange, half grown larvae. It would appear from 

 the above as though the flight of the midges and deposition of eggs 

 must extend over some weeks and development be comparatively 

 rapid, otherwise such conditions could hardly obtain. The older 

 galls will undoubtedly produce adults early in the spring, while from 

 the smaller ones midges may not develop till into the summer. 



Dicrodiplosis antennata, new species. 



Larva. — Length 4 mm., a variable reddish orange, lighter and tapering 

 somewhat at each extremity. Head small, slender, dark, chitinized, apparently 

 greatly produced as a slender, decurved beak ; breastbone long, slender, reddish 

 brown and obtusely dentate, each segment ventrally with a transverse row of four 

 light yellowish, rudimentary pseudopods ; posterior extremity obtuse, tubercu- 

 late. Another larva is somewhat stouter, having a length of 3.5 mm., mostly 

 yellowish and apparently with a shorter breastbone and a somewhat shorter, 

 less distinctly chitinized head. This latter may possibly belong to another 

 species. 



Male. — Length 2 mm. Antennae as long as the body, sparsely haired, the 

 basal enlargement fuscous, the distal enlargement yellowish brown ; 14 seg- 

 ments, the fifth having the stems with a length i':; and twice their diameters, 

 respectively. Palpi : first segment short, irregular, second narrowly oval, with 

 a length 2J/2 times its diameter, the third ^ longer than the second, moderately 

 stout, the fourth apparently longer than the third, slender. Mesonotum dark 

 brown. Scutellum fuscous yellowish, postscutellum yellowish, posteriorly yel- 

 lowish brown. Abdomen reddish brown. Genitalia fuscous yellowish. Halteres 

 yellowish apically, reddish brown basally. Coxae yellowish. Legs mostly fuscous 

 straw. Claws moderately stout, evenly curved, the pulvilli shorter than the 

 claws. Genitalia : terminal clasp segment as long as the basal clasp segment, 

 the latter strongly constricted basally and with a long, triangular lobe internally ; 

 dorsal plate deeply and narrowly emarginate, the lobes moderately slender, nar- 

 rowly rounded and sparsely setose ; ventral plate long, broad, roundly truncate. 



Female. — Length 3 mm. Antennae extending to the fourth abdominal seg- 

 ment, sparsely haired, pale yellowish ; 14 segments, the fifth with a stem ^4 the 

 length of the cylindric basal enlargement, which latter has a length thrice its 

 diameter ; terminal segment with a length four times its diameter and a short, 



