REPORT OF THE STATE ENTOMOLOGIST IQiS 155 



of the cylindric basal enlargement, which latter has a length three 

 and one-half times its diameter; terminal segment subcylindric, the 

 basal portion with a length three times its diameter. Apically there 

 is a stout, knoblike projection. Palpi; first segment subquadrate, 

 the second narrowly oval, with a length about twice its diameter, 

 the third a little longer, more slender, the fourth one-half longer 

 than the third, somewhat dilated apically. Mesonotum dark brown, 

 the submedian lines rather thickly haired. Scutellum reddish brown, 

 postscutellum yellowish brown. Abdomen sparsely haired, reddish 

 yellow distally. Ovipositor short, the terminal lobes narrowly oval, 

 with a length a little over twice the diameter. Other characters 

 nearly as in the male. 



Several parasites have been reared from this insect, some of which 

 are of considerable importance. Professor Washburn reared a 

 Peteromaline which Washington authorities stated apparently 

 represented an undescribed genus. 



RETINODIPLOSIS Kicff. 



1912 Kieffer, J. J. Neue Gallmucken-Gattungen, Bitsch, p. i 



1913 Genera Insectorum Fasc. 152, p. 220 



191 5 Felt, E. P. Econ. Ent. Jotir., 8:408 



The species referred to this genus represent a homogeneous group 

 of mostly closely allied species which are rather easily recognized by 

 the dark-red or reddish brown color in connection with the short, 

 almost transverse basal stems of the flagellate antennal segments, 

 the rather long, broad distal enlargements, the fine, many-looped 

 circiunfila and the rather heavy genitalia, the two plates being 

 usually deeply bilobed. 



The larvae of the pitch-inhabiting forms are most easily recog- 

 nized by the bilobed posterior extremity, the apex of each lobe being 

 fuscous, heavily chitinized and strongly spined, an adaptation which 

 permits the larva to extend its anal spiracles, located in these lobes, 

 through the surface of the viscous resin it inhabits. The generic 

 type is C ecidomyia resinicola O. S. A somewhat anom- 

 alous, though closely allied species, R. taxodii Felt, has been 

 tentatively referred to this genus. 



Key to Species 



a Basal stem of the fifth antennal segment in the male with a length greater than 

 its diameter 



h Abdomen light yellowish brown, length 2 mm, the fifth antennal segment 

 having the stems each with a length one-half greater than its diameter. 



Reared from pitch masses on hard pine 



resinicola O. S., C. ai85, ai930 



