Dec.,1918 Bulletin of the Brooklyn Entomological Society 118 
pressed, whitish and margined with reddish, the third segment pale on 
the apical margin of the ventral side. 
Head: Large, conical, shaped much like that of the male; width .85 
mm., vertex .5I mm., length .45 mm., height from vertex to tip of tylus I 
mm.. eyes small, ovate, height .40 mm., width .23 mm.; lower part of the 
face thicker than in the male. Rostrum, length 1.48 mm., attaining the 
posterior margin of the hind coxe. 
Antenne: Segment I, length .25 mm.; II, .o4 mm.; III, 80 mm.; IV, 
missing; dark chestnut brown, third segment equally thick as the second. 
Pronotum: Length .63 mm., width .7r mm., widest at the middle, nearly 
cylindrical, disk tending to be globose and twice indented at the center, 
posterior margin curved forward at the middle, collar poorly defined, calli 
absent. Scutellum scarcely defined, no indication of wings, thorax dark 
chestnut brown, metasternal orifice white. 
Legs: Dark fuscous brown, tibiz darker. 
Venter: Dark chestnut brown to blackish; globose, constricted at the 
second segment, tergite of the first segment arched, indented transversely, 
cream colored and margined with reddish; posterior half of the second 
tergite and posterior margin of the third sternite and pleurite, pale to 
cream colored. 
Holotype: 2, June 17, 1900, Lamar, Colorado (E. D. Ball) ; 
Cornell University Collection. Were 
Allotype: Taken with the type. 
Paratypes: 2 topotypic; other specimens taken with the types 
by Dr. E. D. Ball. 
The species is named in honor of Dr. E. D. Ball who has per- 
haps collected and observed more of the ant mimic Miride than 
any other worker. 
Parthenicus aridus new species. 
Large for Parthenicus, pale ash gray marked with black, sericeous to- 
mentose silvery pubescence intermingled with fine golden hairs. 
g. Length 3.9 mm., width 1.37 mm. Head shaped very similar to that 
of vaccini, tylus more prominent and strongly indented at the base; rostrum 
reaching nearly to the middle of the venter. Antenne pale, the second 
segment annulated with black near the base and again at the middle; first 
segment with a transverse mark across the upper side slightly beyond the 
middle and two spots nearer the base, black. Entire dorsum sparsely 
freckled with obscure reddish and a few larger fuscous spots, some black 
tomentose pubescence across the tip of the embolium and corium; mem- 
brane pale, irregularly flecked with fuscous, a larger fuscous spot just 
beyond the apex of the cuneus. Posterior femora broad, saltatorial, 
closely speckled with black, more densely and with larger spots on the 
