NORTH AMERICAN APTERYGOGENEA. l8l 



this species resembles much that of E. myrmecopliila 

 Reiit. On the white -yellow ground -color blue -violet 

 spots are closely spread. The antenna are bluish, the 

 extremities and furcula colorless. 



Habitat. Berkeley and Alameda, California; Sonora, 

 Mexico. (Coll. G. Eisen.) 



Entomobrya atrocincta n. sp. 



Honey yellow. On the head an anchor-like spot and two 

 brownish lines going through the eye-patches. The second 

 thoracic segment inclosed by a dark margin. The poste- 

 rior of the third thoracic and the first abdominal segment 

 black-brown. The eyes are sixteen, eight on each side of 

 the head. The three outer joints of the ant en nee are of 

 the same length. The zipper claw provided with two small 

 teeth. The loxcer claw is lanceolate and unarmed. The 

 mucro is provided zvith two hooks. Length 1.25 mm. 



The terminal joint of the antenna is generally wholly 

 blue -violet. The dark transverse sharply contrasts with 

 the waxen ground -color. The animal is very richly 

 clothed with alternately club-shaped and pointed hairs. 

 The body seems to me to be somewhat thinner than that 

 of the European species of the above genus. 



In my materials there are many individuals without any 

 distinct delineation. They sometimes are quite yellow, 

 sometimes provided with a pale dark delineation on the 

 head and on the anterior segments of the body. These 

 are, no doubt, young animals. It is possible that Pack- 

 ard has before described this species under the name of 

 Degeeria perpulchra, of which he says: "This exquis- 

 itely pretty form may be at once known by its small size, 

 the black band around the head or on front and side of 

 thorax and the honey yellow abdomen." In that case he 

 has had a young specimen before him. 



Habitat. Hanford, California. (Coll. G. Eisen.) 



