REPORT OF THE STATE ENTOMOLOGIST 1918 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 Kieff. 
1912 Kieffer, J. J. Neue Gallmucken-Gattungen, Bitsch, p. 1 
1913 ————— Genera Insectorum Fasc. 152, p. 220 
1915 Felt, E. P. Econ. Ent. Jour., 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 
circumfila 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 Cecidomyia 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 
b 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......-.-----+-+++ee+++e+2> 
resinicola O.S., C. a185, a1930 
