408 PROCEEDINGS OF THE ACADEMY OF [Jl-^^y, 



Myotis lucifugus longicrus. 



The only Colorado record of this bat which I have found is one 

 by Miller^^ for Grand Junction. I have taken it at Steamboat Springs, 

 and have a badly mutilated skin from Eldora which is probably one of 

 this species. 

 Myotis evotis. 



The only Colorado record I have seen is one by Miller^^ from Loveland. 

 I have a specimen taken in the Yellow Jacket Mountains 21 km. east 

 of Steamboat Springs at an approximate altitude of 2,140 m. 



(3) Description of a new species of bat from Boulder. 

 Eptesicus pallidas sp. n. 



Type No. 142,526 9 ad., collection of U. S. Nat. Mus. Collected 

 by R. T. Young at Boulder, Colorado, July 22, 1903. 



Distribution. — Known from type locality only. 



Diagnosis. — Skull identical with that of Eptesicus fuscus. Size 

 largest of American species of the genus. (iVverage total length of 

 four specimens, all females, 124.)^^ 



Color palest of American species of the genus, distinctly lighter than 

 that of E. fuscus. 



Color. — Above brownish ashy, the basal half of hairs fuscous; 

 below pale silvery gray, the basal half of hairs fuscous, with a narrow 

 transition zone of brownish ashy between the inner and outer parts. 

 Dorsally and ventrally along the line of attachment, and on the surfaces 

 of the membranes, the basal fuscous zone of the hairs disappears. 



Measurements of Type. — ^Total length, 127; tail, 50; hind foot, 12. 

 Skull, occipito-nasal length, 19; interorbital constriction, 4; zygomatic 

 breadth, 13; upper tooth row, 8.5; palato-basi-occipital length, 15; 

 mandible (from condyle to symphysis), 14; lower tooth row, 9. 



Measurements (average of four females). — Total length, 124; tail, 

 49; hind foot, 12.'* Average of two females in alcohol: Ear from 

 crown, 13.5; tibia, 20.5 ; forearm, 49; thumb, 8; longest "finger," 80.5 ;25 

 width of ear, 11.5; tragus (from posterior angle), 8. Skull (average of 

 three specimens), ^^ 18,5, 4, 12.5," 8, 14.5, 13.5, 9. 



Remarks. — While conclusions based on so small a number of speci- 

 mens as I possess are necessarily uncertain, still I believe that, since 



^' Miller, G. S., Jr.: Revision of the North ^\nierican Bats of the Family Vesper- 

 tihonidae, N. A. Fauna, 13, p. 65. 

 22 Op. cit., p. 80. 

 2^ All measurements in mm. 

 2* Average of five specimens including one male. 

 2^ From tip to base of phalanges not including carpus. 

 2" Measiirements given in same order as those of the type. 

 2' Average of two specimens. 



