1944] 
Millipeds 
169 
PARAIULIDsE 
Saiulus canadensis (Newport) 
S— 1501, Durbin, W. Va., August 1, 1943; S-2209, Rochester, 
N. Y., October 17, 1943; S-2280, Owego, N. Y., October 20, 
1943; S-2356, Ludlow, Pa., October 21, 1943. 
Ptyoiulus pennsylvanicus (Brandt) 
S-2293, Owego, N. Y., October 20, 1943; S-2356, Ludlow, 
Pa., October 21, 1943; S-2406 and S-2447, Marienville, Pa., 
October 21, 1943. 
SPIR OB O LI DAE 
Arctobolus dolleyi Loomis 
S-349, Urania, La., July 14, 1943; S— 5 15, Haleyville, Ala., 
July 17, 1943. 
Arctobolus marginatus (Say) 
S-805, Barnardsville, N. C., July 20, 1943; S— 1269, Mon- 
terey, Va., July 30, 1943; S-1641, Mt. Lake, Va., August 3, 
1943. 
Arctobolus keysi sp. nov. 
The single male, type, collected May 12, 1944 at Lantana, 
Florida, by Alfred Keys for whom it is my pleasure to name 
this handsome species. 
Fig. 2. Arctobolus keysi. a , Gonopods, anterior view; b, Gonopods, 
posterior view. 
Diagnosis: Coloration different from any other known mem- 
ber of the genus and with gonopods structurally distinct. 
Description: Length 73 mm.; 47 segments. Living color gen- 
erally light fawn brown or light khaki with the hindfelt of the 
