364 



PSYCHE. 



[July, 1902 



^8(2), q^"^?. 



as a soil insect and several blind species 

 of Sinella and Pseudosinella, especially 

 the latter, have been found in Europe 

 and America, confined to caves or living 

 under stones and in other dark places. 

 The two species here described as hav- 

 ing eyes are doubtless not restricted to 

 dark situations. 



For each species I give the numbers 

 used by Dr. Motter to designate particu- 

 lar specimens in the Stiles-Motter col- 

 lection of grave fauna, deposited in 

 the U. S. National Museum. Each of 

 these numbers is followed by another 

 in parentheses that expresses an approxi- 

 mate estimate of the number of individ- 

 uals. 



No. 46 I did not have, and I did have 

 some that do not appear in the table 



already referred to. These are Nos. 51 

 (5 individuals), 105 (3), 1 12 (7) , 123 

 (9), 143 (2), 151 (2), 153 (15), 156 (3), 

 178 (6), 187 (500), 223 (15), 399 (i), 

 408 (50), 414 (2). 



Isotoma fimetaria (L.) Tull. 



1761. Podiini fimetaria Linnaeus, 

 Fauna Svecica, ed. 2. 



1872. Isotoma fimetaria Tullberg, 

 Sveriges Podurider, p. 48, taf. 9, figs. 

 32-33- 



Figures 1-2. 



White. Eyes absent. Postantennal or- 

 gans ovate or oval. Antennae slightly long- 

 er than the head, with segments as 6 : 9 : 9 : 

 17; first two segments cylindrical, third di- 

 lated apically, fourth ellipticocylindrical. 

 Superior claws (fig. i ) smoothly tapering, 



scarcely curving, untoothed ; inferior claws 

 half as long, lanceolate, acuminate ; hind 

 claws largest ; one unknobbed tenent hair. 

 Abdomen feebly dilated with third and fourth 

 segments subequal. Furcula as long as the 

 head, borne by the antepenultimate segment 

 and not attaining the ventral tube (extending 

 two thirds as far) ; dentes two and one half 

 times the manubrium in length, slender, ta- 

 pering ; mucrones (fig. 2) elongate, sub- 

 equally bidentate ; apical tooth scarcely 

 hooked, second erect ; proximal two thirds of 

 mucro suboblong. Numerous stiff setae on 

 head, body, and appendages ; several long 

 erect setae in a row across the middle of each 

 abdominal segment ; many long stiff setae at 

 the apex of the abdomen. Length, .87 mm. 



This is one of the best known species 

 of its order and is a cosmopolitan insect. 

 It is essentially a soil species, often 

 occurring about the roots of plants. 



Five specimens: 153 (3), 151 (2). 



Isotoma sepulcralis, sp. nov. 



Figures 3-S. 



White. Eyes (fig. 3) normally ten, some- 

 times eight. Postantennal organs broadly 

 elliptical, oval or ovate. Antennae subequal 

 to the head in length ; segments stout, as 6 : 

 10: 9: 19; third segment dilating distally, 

 fourth elliptico-cylindrical. Body elongate 

 cylindrical. Superior claws (fig. 4) uniformly 

 curving and tapering, untoothed ; inferior 

 claws extending two thirds as far, ovate-lan- 

 ceolate, acuminate, with stout midrib; front 

 claws smallest, the other pairs successively 

 larger ; tenent hairs absent. Fourth abdom- 

 inal segment one third longer than the pre- 

 ceding one and bearing the furcula. Furcula 

 short, extending but half way to the ventral 

 tube, strongly tapering ; manubrium and 

 dentes subequal in lengtli ; mucrones (fig. 5) 

 one third as long as dentes, elongate, sub- 



