88 NEW YORK STATE MUSEUM 
innumerable small mites, subsequently identified by Nathan Banks 
as a species of Tyroglyphus and a red mite belonging to the family 
Gamasidae, the latter being less abundant. The comb may have 
been infested by Arthrocnodax prior to its shipment from California 
though the probabilities indicate, in view of subsequently developed 
facts, that the Dipterous larvae were preying on the Tyroglyphus. 
This species was reared from a twig badly infested by Pulvin- 
aria vitis Linn. and from a breeding jar containing forest tent 
caterpillar, Malacosoma disstria Hubn. cocoons and 
débris received from Tacoma, Wash. It was also obtained from 
a jar containing Viburnum leaves bearing numerous blister galls. 
The midge larvae were doubtless zoophagous in each instance. It 
is possible that Aphanogamus floridanus Ashm. 
(Insect Life, 4:123) may be a parasite of this species. 
Male. Length 1mm. Antennae one-fourth longer than the body, 
thickly haired, fuscous straw, the basal segment yellowish; fourteen 
segments, the fifth with stems one-half and one and one-fourth 
times their diameters respectively; terminal segment with the distal 
enlargement somewhat produced, subcylindric and distally tapering 
to an obtuse apex. Palpi (fig. 4); the first segment short, stout, 
subquadrate, the second 
nearly twice as long as the 
first, stout, narrowly oval, 
the third a little longer and 
more slender than the second, 
the fourth one-half longer 
than the third, more slender. 
Mesonotum yellowish or red- 
dish brown, the submedian 
lines indistinct. Scutellum 
and postscutellum yellowish 
Fig.  Arthrocnodax apiphila, fifth an- OT orange yellow. Abdomen 
tennal segment of female (enlarged, yellowish or deep orange 
See ai carmine, genitalia fuscous 
yellow. Wings hyaline, costa 
fuscous straw; halteres pale orange. Coxae and femora basally 
pale yellow, the femora distally and tibiae light straw, tarsi light 
brown, the distal segments darker; claws long, slender, strongly 
curved, the pulvilli distinctly shorter than the claws. Genitalia; 
basal clasp segment long, stout, a rounded lobe basally; terminal 
clasp segment stout, swollen basally; dorsal plate short, broad, 
deeply and triangularly incised, the lobes narrowly rounded later- 
ally; ventral plate long, broad, narrowly rounded. 
Female. Length 1.25-1.5 mm. Antennae extending to the fourth 
abdominal segment, the fifth (fig. 5) with a stem one-fourth the 

