170 CALIFORNIA ACADEMY OF' SCIENCES. 



COLLEMBOLA Lubbock. 

 Family SMINTHURID^ Lubbock. 

 Gen. I. Sminthurus Latreille. 

 Sminthurus longicornis n. sp. 



Bluish black. The terminal joint of the antennce is cumu- 

 lated and double the length of the preceding-. Tibial tenent 

 hair wanting. The upper claw is enclosed by a chitinous 

 covering and armed zvith a large tooth. The lozuer claw is 

 lanceolate, one-toothed and provided with a thread-like 

 appendage. The dental segment of the furcula are want- 

 ing tenent hairs. The mucrones are spoon-shaped and 

 serrated only in one margin. Length 1 nun. 



This species is, by the shape of the mucrones, closely 

 allied to S . fuscus Linn., but differs plainly by the articu- 

 lation of the antennae and in the want of tenent hairs on 

 the caudal appendage. 



S. fuscus Linn, has the terminal joint of the antennae 

 of the same length as the two preceding joints together, 

 and has the two middle joints provided with large setae. 

 Our form, on the contrary, has the terminal joint of the 

 antennae evidently longer than the three preceding ones 

 together, and the setae on the middle joints replaced by 

 scattered thin hairs. By these characteristics the species 

 comes near S . Eisenii Schott, from which it differs by 

 the shape of the mucronal segment and by its color. 



Habitat. San Lazaro, Cape Region, Baja California. 

 (Coll. Eisen and Vaslit.) 



I will in this connection observe that the species of the 

 above genus which, in my memoir on Calif ornian Collem- 

 bola, I have identified with S. niger Lbk., on a renewed 

 examination has proved to be an independent species, to 

 which I propose to give the name of S . alb i pes. The faulty 

 determination was owing to my attaching too great weight 



