REPORT OF THE STATE ENTOMOLOGIST 1918 235 
long as the enlargement. Palpi (fig. 52b) consisting ofsbut three 
segments, the first short, subquadrate, the second twice the length 

Fig. 52 Adiplosis toxicodendri: a, fifth antennal segment of male; 3, 
palpus; c, distal tarsal segment (enlarged, original) 
of the preceding, rounded at each extremity, the third a little shorter 
than the second, more slender; face fuscous yellowish, eyes large, 
black. Mesonotum reddish brown, submedian lines pale yellowish, 
sparsely ornamented with fine setae. Scutellum and pleurae fuscous 
yellow, postscutellum yellowish. Abdomen a nearly uniform fuscous 
brown, rather thickly clothed with fine setae. Wings (pl. 16, fig. 2) 
hyaline, costa reddish brown; halteres yellowish transparent. Coxae 
and femora pale yellowish, tibiae and tarsi pale brown, tarsi slightly 
darker; claws (fig. 52c) rather slender, strongly curved, simple. 
Genitalia; basal clasp segment stout, obliquely truncate; terminal 
clasp segment slender, swollen at the base; dorsal plate broad, 
deeply incised, the lobes well separated, narrowly rounded; ventral 
plate broad, broadly rounded; style stout, tapering, narrowly 
rounded. Type Cecid. 263. 
MONARTHROPALPUS Rubs. 
1892 Rubsaamen, E. H. Berln. Ent. Zeitschr., 37:329, 381 
1896 Kieffer, J. J. Wien. Ent. Zeit., 15:92, 94 
1897 ————— Syn. Cecid. de Eur. & Alg., p. 30 
1910 Rubsaamen, E.H. Zeitsch. Wissenschaft. Insektenbiol., 15:284 
1911 Felt, E.P. N.Y. Ent. Soc. Jour., 19:58 
1913 Kieffer, J. J. Gen. Insect., fasc. 152, p. 149 
This peculiar Diplosid is easily distinguished by the uniarticulate 
palpi and the normal mesonotum. The male binodose antennal 
segments have three circumfila, the claws are simple and the third 
vein unites with the margin near the apex of the wing. The female 
has the ovipositor terminating in a long, stout, chitinous spine with 
a length equal to about one-half the diameter of the abdomen. The 
reduction of the palpi, the approximation to equality in the develop- 
