REPORT OF THE STATE ENTOMOLOGIST 1918 151 
heavy, chitinous teeth. Dorsal plate deeply incised, the lobes 
narrowly rounded ; ventral plate broad, deeply and broadly emarginate, 
the lobes broadly rounded; style very stout, short. Type Cecid. 167. 
Paradiplosis partheniicola Ckll. 
1908 Cockerell, T. D. A. Entomologist, 1900, 33:201 (Diplosis) 
1918 — N.Y. State Mus. Bul. 200, p. 202, 204 

This reddish midge was reared March 26, 1900 by Prof. T. D. A. 
Cockerell from gallson Parthenium incanum collected at 
the foot of Picacho mountain, Mesilla valley, New 
Mexico. The type material, kindly placed at our 
disposal by the describer, has enabled us to refer 
the insect tentatively to the above-named genus 
and also to supplement, in considerable measure, 
the original description. 
Gall (fig. 26). Diameter 5 mm, woolly, snow- 
white and appearing like little tufts of cotton 
wool at the base of the leaves. 
Larva. It is described by Professor Cockerell 
as orange. The exuviae are colorless, except the 
dark sepia brown anterior extremity. 
Male. Length 2.5 mm. Antennae probably 
nearly as long as the body, sparsely haired, pale 
yellowish; fourteen segments, the fifth with stems 
one and one-half and two times their diameters, 
respectively, distal enlargement with a length 
one-half greater than its diameter, slightly ex- 
panded at the distal fourth. Mesonotum reddish 
brown. Scutellum pale yellowish, postscutellum a 
little darker. Abdomen dark yellowish brown. Wings hyaline, costa 
pale straw, the third vein uniting with the margin well beyond the 
apex, the fifth, subobsolete distally, joining the posterior margin 
at the distal third, its branch at the basal third. Halteres pale 
yellowish. Coxae yellowish; femora, tibiae and tarsi mostly a pale 
straw. Genitalia; basal clasp segment short, stout; terminal clasp 
segment short, greatly swollen near the middle; dorsal plate mode- 
rately long, broad, deeply and triangularly emarginate, the divergent 
lobes broadly rounded; ventral plate moderately long, broad, broadly 
rounded; style short, tapering, acute. 
Female. Length 2.5 mm. Antennae extending to the second 
abdominal segment, sparsely haired, very pale; fourteen segments, 
the fifth having a stem one-fifth the length of the basal enlargement, 
which latter has a length fully three times its diameter, is strongly 
constricted near the middle and has moderately thick subbasal and 
subapical whorls of setae; terminal segment reduced, subcylindric, 
with a length of about two and one-fourth times its diameter and 

Fig. 26 Paradi- 
plosis parthenticola, 
galls on Parthenium 
twigs (author’s illus- 
tration) 
