inpTi-:i;.\-Mrsni> i . 



Mi -i- \ sji. 

 IM. . r >, Ki--. Hit;. 108. 



p. Scudil.. Hull. ('. S. <;.,!. (1,-o-r. Snr\. T.Tr.. Ill, 757 (1877). 



A third specif.^ is represented bv three m- four contracted skins, which 

 are too uncharacteristic to name, though it inav In- seen that they -.in- distinct 

 from the others. As preserved they :ire almost black: the skin is much 

 wrinkled and smooth : the body pretty regularly and bluntly obovatc, nearly 

 twice as long as broad; at the end of one, two colorless oval patches lie 

 united, side l>v side, pn-ssi-d againstthe extremity, and doubtless represent 

 the head, and prove it to be different from the other species ; it is, however, 

 impossible to say what its alh'nities may be 



length of body, S.. r >"""; breadth, 4""". 



Chagrin Valley, \Vhite River, Colorado. ( W. Denton). 



MtTSCA IIYDROPICA. 



"PI. r>, Figs. TL', !L', ;i;(. KIT. 



Mu.ica hydropica Scudd., Bull. U. 8. Geol. Geogr. Snrv. Terr., HI, ?.~.?-T.~.- . 1-J77). 



A t'oiirtli species is represented by two bodies and a skin, which present 

 an entirely different appearance from the preceding three species, but which 

 may temporarily be i;iven the same broad generic name. En this species the 



form, even when contracted, is far more elongated than in the others: the bod v 

 is nearly live times as long as broad, is broadest just behind the nmndlv 

 pointed head, tapers rapidly toward it, but Lfentlv po.Meriorlv to the middle, 

 behind which it is eipial. In the skin the part of the body piv M -rv."l i- 

 eipial and very broad, excepting toward the head, where it rapidly narrow S, 

 the head being well rounded or slightly produced ; the month parts, instead 

 of being withdrawn a little from the front extremity of tin- hodv, as in the 

 *pecies ab-eady described, lie at it- \ er\ lioiindarv. and the hl:ide> are par- 

 allel instead of posteriorly di\er-eiit. The integument is covered rather 

 profusely with very short, conical, tapering hairs, scarcely more tliijn twice 

 as lon^ as their breadth at base The larva is very distinctly handed with 

 darker and lighter color-, a- the empty skin shows, the posterior third of 

 each segment being occupied by a very dark band, darkest on the d. 



surface, while a taint pale transverse line breaks the anterior portion into 

 t\\o eipial halves of the same width as the blackish hand. 



