PODURIDS. 



143 



elbow, and with a short terminal segment offering the appear- 

 ance of being many -jointed. 



PODURID^E. This family comprises those species of the old 

 genus Podura, in which the mouth has mandibles [also maxilla3 

 and a labium], and the body is elongated, with a more or less 

 developed saltatory appendage at the posterior extremity. 



Orchesella. Segments of the body unequal in size, more or 

 less thickly clothed with clubbed hairs. Antennae long, six- 

 jointed. Eyes six in number on each side, arranged in the 

 form of an S. (One or two beautiful species live about Salem.) 



Degeeria. Segments of the body unequal in size, more or 

 less thickly clothed by clubbed hairs. Antennae longer than the 

 head and thorax, filiform, four-jointed. Eyes 

 eight in number on each side of the head. 

 (Two species, Degeeria decem-fasciata, PL 

 10, Figs. 2, 3, and D. purpurascens, Figs. 4, 5, 

 are figured in the "Guide to the Study of 

 Insects." Figure 168 represents a species 

 found in Salem, Mass., closely allied to the 

 European D. nivalis. Five species are already 

 known in New England.) 



Seira. Body covered with scales. Antennas 

 four-jointed; terminal segment not ringed. 

 Eyes on a dark patch. Thorax not projecting 

 over the head. Abdominal segments unequal. 



Templetonia. Segments of the body sube- 

 qual, clothed by clubbed hairs, and provided 

 with scales. Antennae longer than the head 

 and thorax, five-jointed, with a small basal 

 segment, and with the terminal portion ringed. 



Isotoma. Four anterior abdominal segments subequal, two 

 posterior ones small; body clothed with simple hairs and with- 

 out scales. Antenna} four-jointed, longer than the head ; seg- 

 ments subequa'l. Eyes seven in number on each side, arranged 

 in the form of an S. (Three species are found in Massachu- 

 setts, one of which (I. plumbea) is figured on PI. 10, Figs. 6, 7, 

 of the "Guide to the Study of Insects," third edition.) 



Tomocerus. Abdominal segments unequal, with simple hairs 

 and scales. Antennae very long, four-jointed, the two terminal 

 segments ringed. Eyes seven in number on each side. (The 

 European T. plumbea, Podura plumbea of authors, is our spe- 



168. Degeeria. 



