1906.] NATURAL SCIENCES OF PHILADELPHIA. 363 



AORIDID^. 



ACRYDIUM Geoffrey. 

 Acrydium granulatum Kirby. 



Hill at head of springs, Mammoth Hot Springs, Yellowstone Park, 

 Aug. 5, 2 immature specimens. 



Careful search revealed no mature specimens. 

 Acrydium crassum (Morse). 



Manitou, Colorado, 6,324 feet, Aug. 16, 3 d', 8 ? ; 6,700 feet, Aug. 

 23,' 1 c?, 1 9. 



This species has previously been recorded from localities in northern 

 and north-central Colorado: Fort Collins, Laporte, Steamboat Springs, 

 Poudre river, Platte Canyon and Denver. 



This species was found among the mountain-loving plants in the 

 immediate vicinity of scrub oak bushes. It appeared to be extremelj^ 

 local, for I found it in but one small area, where, however, it was 

 common. 



ACRIDINiE. 

 SYRBULA Stai. 

 Syrbula admirabilis (Uhler). 



St. Louis, Missouri, Aug. 27, 18 d', 12 9 . 



These specimens are inseparable from New Jersey individuals. 



A common species in the tall weeds of a vacant lot in the city. 



ACROLOPHITUS Thomas. 

 Acrolopliitus hirtipes (Say). 



Mammoth Hot Springs, Yellowstone Park, 6,215 and 6,500 feet, 

 Aug. 5, 2 d^, Colorado Springs, Colorado, Aug. 18, 4 d^, 9 9 . Prairie 

 land, Colorado Springs, Aug. 18, 1 9 . Knob Hill, Colorado Springs, 

 Aug. 17-22,7 J^, 13 9. 



This series exhibits a great range of color variation, extending from 

 the typical blotched form to the uniform one tentatively named 

 unijormis by Bruner.^ The latter does not appear worthy of recogni- 

 tion, as the extremes and intermediates are present in both the larger 

 series examined. 



This species was quite scarce on the hillsides about the iMammoth Hot 

 Springs, being found among sage and mountain plants. On the prairie 

 outside of Colorado Springs the species was extremely plentiful and 



^ Biol. Cent.-Amer., Orth., II, p. 47. 



