AMERICAN APTERA. 417 



Hoploderma lurida n. sp. 



(Plate XVI., Fig. 27.) 



Light brown, with a pea-green tinge ; integument of abdomen and 

 eephalothorax very finely pitted. 



Cephalothorax about one-half as long as abdomen and one-half as 

 high as long. Pseudostigma round, flat, with radiating ridges, its 

 diameter equals the widfh of femur one, situated approximate to the 

 posterior ventral margin of dorso-vertex ; pseudostigmatic organ long, 

 narrow, slightly clavate, as long as femur of leg one. When the 

 cephalothorax is extended, the dorsum of adomen projects but slightly 

 over the posterior margin of the former. Mandibles and palpi large 

 and prominent. Cephalothorax with a single pair of hairs near the 

 anterior margin. 



Abdomen about two-thirds as high as long, rounded at its posterior 

 end, anterior margin somewhat concave; dorsum of abdomen bearing 

 about a dozen pairs of rather long, straight, simple bristles. Genital 

 and anal covers large and close together. 



Legs all about the same length, but the anterior pair is stouter than 

 the rest ; tibia of leg one slightly over one-half as long as tarsus ; 

 genual almost as long as tibia ; femur more than twice as long as 

 genual. The tarsus and tibia, especially of the first pair of legs, bear 

 rather prominent straight hairs. Unguis monodactyle and almost as 

 long as the tarsal segments from which they extend. 



Length, 0.82 mm. ; height, 0.46 mm. 



Under bark. Collected by the writer at Urbana, Illinois. 

 One specimen. 



EXPLANATION OF PLATES. 



PLATE XIII. 



Fig. 1. — Eupalus pectinatus, n. sp., left, palpus, x 342. 

 Fig. 2. — Eupalus pectinatus , hair arising from pore on the posterior 

 dorsal aspect of the cephalothorax, x 342. 

 Fig. 3. — Caligonus cardinalis n. sp., x 85. 

 Fig. 4. — Caligonus cardinalis, distal end of palpus, x 550, 

 Fig. 5. — Raphignathus tessellatus n. sp., x 85. 

 Fig. 6. — Raphignathus tessellatus, right palpus, x 342. 



PLATE XIV. 



Fig. 7. — Neophillobius harti n. sp., x 60. 



Fig. 8. — Rhyncholophus tumidus n. sp., x 60. 



Fig. 9. — Rhyncholophus longipalpus n. sp., right palpus, x 195. 



Fig. 10. — Microtrombidium nigrum n. sp., eyes and eyestalk, x 550. 



Fig. 11. — Microtrombidium nigrum, hair from body, x 550. 



TRANS. AM. ENT. SOC, XXXV. (53) DECEMBER, 1909 



