508 Pomona College Journal of Entomology 



Oribata latincisa Evving var. gigantea n. var. 

 (Figure I6i) 



Length .80-. 98 mm. Color dark chestnut, polished. Abdomen globose with narrow, 

 chitinous, wing-like expansions. Mandible, thick and stout. Lamella blade-like, 

 horizontal. Cusps of lamella short, truncated, lamellar hair rising from shorter 

 corner. Lamellar hairs stout, pectinate. Tectopedium I projects even with trans- 

 lamella; tectopedium I bears stout, curved, pectinate hair projecting in front 

 of rostrum. Rostral hairs not apparent. Pseudostigmatic organ capitate. Inter- 

 lamellar liairs erect, stout, pectinate. Anterior end of abdomen rounded. Femora 

 with blades. Abdomen and wings set with scattering, stout, pectinate hairs, not 

 as stout as lamellar or interlamellar hairs. JVings of abdomen truncated anteriorly. 

 Legs about one-third the length of body, sparsely covered with fine, pectinate hairs. 

 A long, fine, bristle at apex of penultimate joint of legs I and XL Unguis tridactyle. 

 A swollen, pectinate, specialized hair on the outer ape.x of antepenultimate joint, 

 and another midway on outside of penultimate joint of legs I and IL 



Under rotting boards, New Haven, Conn. Somewhat like Oribatella bidentata 

 Banks, but much larger and without the characteristic color markings of that spe- 

 cies. 



Hoploderma capitata n. sp. 

 (Figure 165, above) 



Length .8-.83 mm. Color yellow with black internal organs. Abdomen elliptical, 

 about as broad as high, without wings. Cephalothorax hinged so as to fold down 

 on ventral surface. Aspis without carina; genital and anal covers separate. Anal 

 covers with short spines. No elliptical depressions on aspis. Pseudostigmatic organ 

 capitate. Four long bristles on each side of aspis, and two similar bristles on an- 

 terior end of dorsal abdomen. Legs half the length of body, sparsely set with fine 

 hairs of which some on legs III and IV are pectinate. A long, thin bristle on apex 

 of penultimate joint of leg I. Unguis monodactyle. Under drift-wood, Pawson 

 Park, Conn. 



This species differs from H. globosum Koch, by having the pseudostigmatic or- 

 gan capitate and with quite a stalk instead of sessile and fusiform, and by having 

 only four hairs on the dorsum of abdomen and those placed well forward. 



Genus Pelopsis n. gen. 



Mandible broad at base, suddenly becoming styliform, terminated by minute 

 chelae. No spatulate hairs on any part. Rectangular proj ection from anterior mar- 

 gin of abdomen. Unguis tridactyle. Pteromorphae attached to cephalothorax. 



Near to Pelops, but wholly without spatulate hairs. 



Pelopsis nudiuscula n. sp. 

 (Figure 165, below) 

 Length .51 mm. Color dark chestnut, polished. Abdomen with large, chitinous, 

 wing-like expansions. Mandible broad at base, suddenly becoming and continuing 

 slender and rod-like, chelae small. Interlamellar hairs wanting. Lamella blade- 

 like, horizontal, cusps of lamella deeply emarginate, the two tips being subequal 



