-i rrn 



Mcinerl.] - 1 ' " [Oct. 2, 



Lamina dorsalis 9, 11, 13 angulis productis. 



Pedes anales uugue singulo armati. 



Pori coxales pauciores, ia seriam singulam digesti. 



Pedes penultimi unguibus binis armati. 



Pedum analium coxae calcare nullo. 



3. Lithobius forficatus (Linn.). 



Lithobius forficatus Newport, Trans. Linn. Soc. Lond., xix, p. 3G7. 

 Lithobius Americanus Newport, ibid, xix, p. 365, tab. xxxiii, fig. 29. 

 Lithobius multhlentatus Wood, Journ. Acad. Nat. Sc, new ser., v, p. 13. 

 Lithobius Americanus "Wood, ibid., p. 14. 



Wood, Trans. Amer. Phil. Soc, xiii, p. 148. 



Castaneus vel brunneus, laminis ventralibus pedibusque flavis, robustus, 

 sat rugulosus, scepissime subglaber, interdum hirsutulus, proesertim post, 

 capite magno, subquadrato. Antenna? sat longne, 36-48-articulataj. 



Oculi ocellis 22-35, in series 5-8 digestis. 



Dentes prosternales quini vel septeni. 



Pori coxales 6, 6, 6, 5 — 12, 10, 9, 8, plerique transversales. 



Pedes corporis primi paris calcaribus 2, 3, 2 ; pedes anales calcaribus 1, 

 3, 3, 2 armati. 



Pedes postici longiores, paulum inflati. 



Genitalium femineorum unguis trilobus. 



Long. 14-26 mm. 



For the characteristics of the not fully developed Lithobius 

 forficatus I refer to my Myriap. Mus. Haun., ii, p. 315 and 316, 

 and to the elaborate essay of Latzel, L c, p. 57 ; also for the 

 table of sj'nonymys I refer to Ant. Stuxberg, who in his " Litho- 

 bioidse Americas Borealis " (Ofvers. Kgl. Vet. Akad. Fb'rh., 1875? 

 No. 3, p. 27), gives a list of the synonyms of this animal per- 

 haps complete to his time. 



The species is doubtless the most common of all Lithobii in 

 the eastern part of North America, and the Museum of Com- 

 parative Zoology also possesses numerous specimens not alone 

 from Massachusetts, but also from other places, as Halifax, X. 

 S. ; Britain Island, N. S. ; Amherst, N. H., Mr. A. M. Edmands ; 

 Bee Spring, Ky., Mr. F. G. Sanborn; Anticosti. 



Lamina dorsalis 11, 13 angulis productis. 

 Pedes anales unguibus binis armati. 

 Pori coxales pauciores, in seriem singulam digesti. 

 Pedes penultimi unguibus binis armati. 

 Pedum analium coxa' inermes. 



