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 pre^nng on the Tyroglyphus. 

 This species was reared from a twig badly infested by P u 1 v i n- 

 aria vitis Linn, and from a breeding jar containing forest tent 

 caterpillar, Malacosoma disstria Hubn. cocoons and 

 d6bris received from Tacoma, Wash. It was also obtained from 

 a jar containing Viburnum leaves bearing nirmerous 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 i mm. 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, subc}-lindric and distally tapering 

 to an obtuse apex. Palpi (fig. 4); the first segment short, ^out, 



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 postscutellimi yellowish 

 or orange ^^ellow. Abdomen 

 yellowish or deep orange 

 carmine, genitalia fuscous 

 yellow. Wings hyaline, costa 

 fuscous straw; halteres pale orange. Coxae and femora basaUy 

 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 1.2 5- 1.5 mm. Antennae extending to the fourth 

 abdominal segment, the fifth (fig. 5) with a stem one-fourth the 



Fig. : Arthrocnodax 

 tennal segment of 

 orig nal) 



apiphila, fifth an- 

 female (enlarged. 



