36 BULLETIN 16, UNITED STATES NATIONAL MUSEUM. 



patch, 20-4 to 23-5. Dorsal plates finely reticulated. Antennae and 

 legs long. 



Male: 3, 4, 5, 6, 7 pairs of legs crassate, rest slender; about the first 

 fifteen pairs, excepting the first two, with the tarsal joint armed on the 

 under side with an elongate patch of short tubercles extending from 

 the middle to claw, coxa not tuberculate; femur of fourth pair of legs 

 produced into a knob-like appendage on the under side near the middle 

 and armed with three or four moderately large sharp tubercles ; femur 

 of ninth pair with an inward projecting, cylindrical, tapering, basal 

 lobe, which is indistinctly tuberculate on the upper side. 



Length of body : $ 16 to 18.5 mm , width 1.2 to 1.5 mm ; 9 length 13 to 

 lG mm , width .9 to 1.2 mm , antennae 2 mm . 



This new species is more related to the cave form Graspedosoma 

 bollmani, the male of which has the same peculiar knobs, but the 

 tuberculatum is different. From Harger's description of G. glomeratum 

 this species seems to differ in having a dark median dorsal line, besides 

 being of a larger size. 



I have examined over a dozen specimens collected by Mr. Carl H. 

 Eigenmann. 



4. Paradesmus dasys, sp. nov. 



Diagnosis. — Very similar to Paradesmus gracilis (Koch), but the tibia 

 and tarsi of male tuberculate beneath; vertex pilose on each side of 

 sulcus, first and penultimate segments with two rows of setae, rest with 

 one; copulation foot resembling that of gracilis. 



Type. — U. S. Nat. Museum. 



Habitat. — Baltimore, Md. 



This species is very closely related to Paradesmus gracilis, as shown 

 by the character of male genitalia, but is at once recognized by the 

 characters given in the diagnosis. The followiug differences were also 

 observed, which, except the characters of male genitalia, are not of 

 much importance: 



Dorsal plates somewhat wrinkled; repugnatorial pore (as compared 

 with Saussure's figure of P. coarctatus = P. gracilis) not placed so far 

 back nor the lateral carinas so swollen; the end of the sheath inclosing 

 the flagellum finely serrate as well as its branch; the other lobe widely 

 three or four toothed; length of body, $ 15.5 to 20 ram , 9 17 to 22.5 mm . 



I have examined three males and a number of females collected by 

 Mr. Charles L. Edwards, of Johns Hopkins University. 



5. Polydesmus testi, sp. nov. 



Diagnosis. — Tuberculatiou as in P. moniliaris Koch,* but the lateral 

 carinas not finely serrated ; tubercles setae-tipped ; male genitalia very 

 similar to Polydesmus inconstans Latzel.t 



* Polydesmus moniliaris Koch, Syst. Myr., 135, 1847 (Pennsylvania) — Polydesmus 

 serratus Wood, Trans. Amer. Philos. Soc, 215, 1865 (Pennsylvania). 

 t Polydesmus inconstans Latzel, Les Myr. Noraiandie, 21, 1883. 



