Dec, I9I2.] Felt: Studies in Itonidid^. 245 



the basal segments yellowish. Ovipositor about half the length of the abdomen, 

 the terminal lobes \vith a length over twice the diameter, narrowly rounded. 

 Other characters as in the male. Color characters from microscopic prepara- 

 tions. Type Cecid 13 12. 



The rather large, reddish brown species characterized below was 

 reared in 1893 from a Pseudococcus species on Solanum at Riverside, 

 California, and through the cotirtesy of Dr. Howard placed at our 

 disposal for study. See the description of D. hclena below for a 

 statement of the differences between the two. 

 Dicrodiplosis helena, new species. 



Gall. — Length 3 mm., subglobular, whitish, on the under surface of the leaf, 

 opening on the upper surface. 



Male. — Length 2.25 mm. Antennae as long as the body, sparsely haired, 

 fuscous yellowish; 14 segments, the fifth with stems % and i^ their diameters; 

 the distal enlargement narrowly oval, with a length 1/2 greater than its diameter ; 

 terminal segment, the basal portion of the stem with a length twice its diameter, 

 the distal enlargement produced, irregular, with a length thrice its diameter and 

 tapering to a short, rounded apex. Palpi : first segment irregular, second with 

 a length thrice its width, the third as long as the second, more slender, the 

 fourth 5^ longer than the third, somewhat dilated. Mesonotum slaty brown, the 

 yellowish submedian lines sparsely haired. Scutellum fuscous yellowish, post- 

 scutellum brownish red. Abdomen sparsely haired, dark brown, the incisures 

 and pleurae brownish red. Genitalia fuscous. Costa dark straw. Halteres 

 mostly fuscous yellowish. Coxae and base of femora light straw, the distal por- 

 tion of femora, tibiae and tarsi mostly fuscous. Claws slender, long, unidentate, 

 the pulvilli as long as the claws. Genitalia : dorsal plate broad, broadly and 

 triangularly emarginate, the lobes broadly triangular ; ventral plate moderately 

 broad, deeply and triangularly emarginate, the lobes narrowly triangular ; style 

 long, stout. Type Cecid a22io. 



This species was reared April 5, 1912, from subglobular galls on 

 the under side of aspen leaves, Populiis tremuloides, collected by Miss 

 Cora H. Clarke at Magnolia, Mass., the preceding August. It is 

 easily separated from the allied D. calif ornica by the shorter distal 

 enlargement and the decidedly longer distal stem of the fifth anten- 

 nal segment. It is also quite different from D. populi reared earlier 

 from a similar gall. We are not certain that this is the maker of 

 the gall. 



Itonida aphidivora, new species. 



Male. — Length i mm. Antennae yi longer than the body, thickly haired, 

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

 2J/2 times their diameter; distal enlargement ovoid, with a length nearly twice 



