242 ENTOMOLOGICAL NEWS. [June, '07 



Cecidomyia acarivora n. sp. 



By E. P. Felt, Albany, N. Y. 



The above named species was received through the courtesy 

 of Dr. L. O. Howard, of the Bureau of Entomology, U. S. 

 Department of Agriculture, from Frederick Maskew, of 

 Southern California, who found the larvae feeding upon 

 Tetranychus mytilaspidis and T. sexmaculatus, infesting lemon 

 leaves and fruit at Chula Vista, California. At the request 

 of Dr. Howard, we have decided to describe this species at 

 once. 



Male. — Length, 1.5 mm. — Antennae longer than the body, probably 

 pale yellowish, rather thickly haired; 14 segments, the first broadly 

 obconic, the second flattened basally, subglobose, the third and fourth 

 slightly fused, they and the following binodose, the enlargement sub- 

 equal; three well-developed circumfili. Palpi apparently composed of 

 five segments, face probably pale yellowish. Mesonotum apparently 

 light brown. Scutellum and postscutellum concolorous. Abdomen a 

 yellowish red. Wings hyaline, costa dark brown, subcosta uniting with 

 the margin near the basal fourth, the third vein just beyond the apex, 

 the fifth, at the distal third, its branch at the basal third. Halteres 

 probably pale yellowish. Legs presumably nearly uniform pale yel- 

 lowish, anterior claws bidentate, the others simple. Genitalia; basal 

 clasp segment long, slender, terminal clasp segment rather short, 

 swollen at the base ; dorsal plate short, broad, deeply and narrowly 

 incised, the lobes broadly rounded distally and with several coarse setaj 

 apically, ventral plate long, broad, somewhat excavated at the basal 

 third, swollen near the distal third, roundly truncate distally and with 

 several conspicuous setae at the slightly notched lateral posterior angles. 



Female. — Length, 1.75 mm. — antennae extending to the fifth abdominal 

 segment, apparently light yellowish, sparsely haired; 14 segments, the 

 third and following with a smooth stem about l / 2 the length of the sub- 

 cylindric basal enlargement. Palpi consisting of four segments, ovi- 

 positor short, the lobes subtriangular, tapering to a narrowly rounded 

 apex and thickly clothed with coarse setae; colorational and other 

 characters about as in the opposite sex. , 



Larva. — Length, 175 mm; rather stout, tapering anteriorly to a 

 rather conspicuous head and broadly rounded posteriorly. Head large, 

 broadly rounded, with a pair of long, slender, cephalic horns at the 

 lateral margins ; mouth-parts rather inconspicuous. 



Types — Cecid 847 deposited in the U. S. National Museum 

 and New York State Museum. 



