• t 



16 THE CANADIAN ENTOMOLOGIST. 



spicuous, set in an excavation beneath the frontal projection, second and 

 third joints subequal, globular, fourth joint elongate, as long or longer 

 than the three basal joints, cylindrical, pointed, the inner side at apex 

 appearing truncated ; legs stout ; claws large, inner claw more than half 

 the length of outer, outer with a denticle at base ; furcula elongate, 

 reaching the hind pair of legs ; manubrium large, reaching beyond the 

 apex of the abdomen, sides straight, sub-parallel ; dentes elongate, as 

 long as the manubrium, broadest at middle, underside with two or three 

 rows of stiff spines ; mucrones short, not longer than broad, with an 

 apical and a preapical tooth. Length, 1-1.25 mm. 



Habitat : Alameda, near Las Cruces, New Mexico. 



Received from Mr. Theo. D. A. Cockerell, who had received them 

 from Mr. E. VanPatten, "who found them in immense numbers at 

 Alameda." 



Schottirus,\\ gen. nov. — Ocelli sixteen, eight on eaeh side of the head; 

 postantennal organ wanting ; antennae short, four jointed ; body cylin- 

 drical, segments sub-equal ; tarsi with two claws ; anal spines present, 

 two. Type, Podura nivicola, Fitch. 



This genus is proposed for those species at present placed in the 

 genus Achorntes and which have anal spines. 



Tctracanthe/Ia, Schott. — Ocelli sixteen, eight on each side of the 

 head ; postantennal organ present ; antenna? four-jointed ; tarsi with two 

 claws ; anal spines present, four, arranged in two rows ; furcula short. 

 Type, Tetracanthella pi/osa, Schott. 



Entom., Tidsk., XII., 1891, 191 ; fig. 



Podur/iippus, Megnin. — Ocelli twenty-eight or thirty, fourteen or 

 fifteen on each side of the head ; antennae four-jointed ; tarsi with a single 

 claw ; furcula short, slender ; ventral tube tuberculate, bilobed. Type, 

 Podurhippus pityriasious, Megnin. 



Bull. Soc. Ent. Fr. (5), VIII., 1878, p. cxxxv. ; Les Parasites, 1880, 

 p. 104 ; fig. 42. 



Podura Linn. — Ocelli sixteen, eight on each side of the head ; post- 

 antennal organ wanting ; antennae four-jointed ; tarsi with a single claw ; 

 furcula long, slender, arcuate ; anal spines wanting. Type, Podura 

 aquatica, Linn. 



Podura gratiulata, sp. nov. — Body, legs and antennae bluish-black; 



£ Hcr^d-ros, obscurus ; oiyia^cauda, 



