= : , ag 
350 =. ~~+=PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 92 
necessitated a redefinition of the entire formosus group, as well as of 
_the subspecies of jarrovii in the poinsettii group. One other sub- 
species, anticipated when the review of the Mexican species was 
written,’ has been defined on the basis of material collected by Dr. 
E..H. Taylor at Omilteme, Guerrero. Still another race, also an- 
ticipated previously, has been defined in melanorhinus of the DRG Ae: 
group. ' 
I am much indebted to Dr. Taylor for assistance in collecting 
numerous specimens, for the gift of several obtained by him in 
regions not visited by me, and Sor the loan of his own material. I 
am also greatly indebted to Dr. L. C. Stuart for permitting me to 
examine material recently collected by him in Guatemala, without 
which a satisfactory allocation of northern Central American mem- 
bers of the formosus group would have been impossible. 
SCELOPORUS STEJNEGERI, new species 
Holotype.—U.S.N.M. No. 112634, an adult male from Tierra Colo- 
rada, Guerrero. 
Bee ee aon, including U.S.N.M. Nos. 112635-112648, and 
EHT-HMS Nos. 22285-22287, 27299-27301, all topotypes, collected 
by E. H. Taylor, Richard Taylor, and H. M. Smith. 
Diagnosis—A member of the formosus group, with a complete or 
very nearly complete, black nuchal collar, not light bordered; supra- 
oculars large, seldom with an outer row of small scales, all oumneied 
from median head scales; frontonasals normal, in contact with each 
* other; 2 canthals; stereo 37 to 42; scales “ann body 45 to 50; 
fee Ocul pores 16 a 21; generally 4 scales (minimum count) foe 
H* nicdian frontonasal to oe al. 
Description of holotype-—Head somewhat elongate, not shortened 
and thickened as in spinosus group; interparietal relatively large, 
larger than entire frontal; parietal short, subtriangular, not reaching 
posterior edge of interparietal; a small, rectangular frontoparietal on 
each side; posterior section of frontal in contact with interparietal, 
less than a third size of anterior section of frontal; frontal ridges 
prominent; five large supraoculars, separated from median head 
scales by one row of small scales, from superciliaries by one complete 
row of small scales and by one or two tiny, extra scales; small, azygous 
scale separating prefrontals medially; frontonasals large, in contact 
with each other, median the largest; a-large (mutilated), trans- 
versely elongate scale in front of median frontonasal; three scales 
from latter to rostral; two canthals; a subnasal, loreal, and single 
preocular; subocular elongate, followed by two keeled postoculars; 
six superciliaries, five visible from above. 
1 Field Mus, Nat. Hist., zool. ser., vol. 26, 1939. 
