REPORT ON THE MYRIOPODS COLLECTED BY LIEUT. W. L 

 CARPENTER, IN 1873, IN COLORADO. 



By A. S. Packard, Jr., M. D. 



MTEIOPODA. 



Lithobius, n. sp. (?)— Fivespecimeus from Colorado, collected by Lieu- 

 tenant Carpenter, indicate a new species, differiDg from L. Americanus^ 

 Newport, in the antennte being longer, though with fewer joints, aver- 

 aging between 24 and 25; the joints being long and gradually diminish- 

 ing in length to the end, while in L. Americanus the three basal segments 

 are long (though shorter than in the Colorado form), and the segments 

 beyond ai-e very short and crowded ; they are much less finely pilose. 

 The labium is much narrower, with from four (young) to twelve teeth 

 (adult). The entire head is slightly longer and narrower, while the body 

 has the same j)roportions as in L. Americanus ', the pits on the coxse are 

 much the same, and the spines on the legs not different. Length, 0.88 

 inch. It is very different from a Californian species received from Goose 

 Lake, Siskiyou County, through Mr. Hollemau, but agrees perfectly with 

 an undescribed species (not Z. pcmcidens, Wood) from San Francisco, 

 Cal. (H. Edwards), in the Museum of the Peabody Academy of Science. 



I forbear to name it, until more specimens are received both from the 

 Eocky Mountains and the Pacific States. It occurred at Camp 1, May 

 23, and Elbert Peak, above 12,000 feet elevation, and on the route from 

 Fair Play to Twin Lakes (Lieutenant Carpenter). 



GeopJiMus, n. sp. (*?) — Two s))ecimens of a species probably allied to 

 G. brevicornis, Wood, were collected by Lieutenant Carpenter between 

 Long's and James's Peaks and between Fair Play and Twin Lakes, Col- 

 orado. It is certainly neither of the other species noticed by Wood. 

 It is closely allied to an undescribed species from Goose Lake, Cal. (J. 

 Hollemau), but differs chiefly in the longer antennae. 



Juhis, n. sp. — Several specimens of a new species were collected by 

 Lieutenant Carpenter on the foot-hills and -plains of Colorado, September 

 20 to October 4. It has 53 S(^gments, exclusive of the head and anal 

 segment; chestnut-brown, with the lateral spots unusually well marked, 

 the dorsal stripe well marked, and the antennas scarcely clavate. The 

 mucro is very short and blunt. In color and general appearance, it is 

 closely allied to J. imjjressus, Say. I should not however feel justified 

 in naming and describing it until larger collections of the Juli of the 

 Eocky Mountains and California have been received, as it is also closely 

 allied to a Californian species received Irom Mr. H. Edwards, and may 

 prove identical. 



It seems probable, from the facts presented above, that the myriopo- 

 dous fauna of Colorado is nearly identical with that of the Pacific 

 States, and it is useless to study the fauna of Colorado without exten- 

 sive material from California and Oregon in a group where there is so 

 much specific variation as in the Myriopods. 



