32 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



All the stomata, except the first, of nearly equal length, first about 

 4 times in length of the dorsal plate. 



Feet moderately carinated, spines rather numerous. 



Last pair of feet a little more than twice as long as body, slender ; 

 tibia somewhat clavate, armed with two long, unequal spines. 



Forceps of the female moderately short, sparsely pilose, on the inner 

 side of the first joint a brush-like bunch of hair ; the first joint longer 

 than last (4:3). 



Length of body 20-25 mm ; last pair of legs 40-55 mm . 



Habitat. — Eastern United States. 



I have examined specimens of this species from Bloomington and 

 New Harmony, Ind. Scutigera linceci, the only other species recorded 

 from the United States, is much smaller and differs in color. 



NORTH AMERICAN SPECIES OF LITHOBIID^ AND SCUTIGERID^E. 



The following is a list of the North and Central American species of 

 Htlwbiidce and Scutigeridce known to date. 



I have used the following letters for the different Zoo-Geographical 

 regions as given in the Eeport U. S. Entomol. Comm., No. 3 : 



B = Boreal (Canadian) Province. 



E = Eastern (Atlantic) Province (n = north ; s = south). 



W = West India or Antillean. 



C = Central Province. 



P = Western (Pacific) Province. 



CA = Central America. 



Family A.— LITHOBIIDJE. 

 Genus I. — Henicops Newport. 



1. Henicops fulvicornis (Meinert). E n. 



Genus II. — Litiiobius Leach. 

 Subgenus Archilithobius Stuxberg. 



2. Lithobius cardinalis Bollman. E n. 



3. Lithobius pullus Bollman. E n. 



4. LithoMus trilobus Bollman. E n. 



5. LithoMus Mlabiatus Wood. E n 



6. Lithobius tuber Bollman. E n. 



7. Lithobius minnesotm Bollman. * E n. 



8. LithoMus paradoxus Stuxberg. P. 



9. Lithobius obesus Stuxberg. P. 



10. Lithobius kochii Stuxberg. P. 



11. Lithobius joivensis Meinert. E n. 



12. LithoMus exiguus Meinert. E n. 



13. Lithobius lundii Meinert. E n. 



14. Lithobius toltecus Humb. & Sauss. C A. 



15. LithoMus pusio Stuxberg. P. 



16. LithoMus proridens Bollman. E n. 



17. Lithobius monticola Stuxberg. P. 



18. Lithobius bipunctatus (Wood). P. 



