380 PROCEEDINGS OF THE ACADEMY OF [Sept., 



Berotmema haydenii (Thomas). 



Colorado Springs, Colorado, Aug. 17, 8 cJ^, 7 ?. Prairie land, 

 Colorado Springs, Aug. 18, 3 c?, 4 9,1 immature individual. Knob 

 Hill, Colorado Springs, Aug. 17-22, 8 c^, 8 9 . Garden of the Gods, 

 Colorado, Aug. 17 and 23, 4 cJ^, 3 9. Fort Morgan, Morgan Co., 

 Colorado, Aug. 24, 1 d^, 1 9. 



Both red and yellow winged forms are represented in this series. 



One of the common prairie species, which I often found in large 

 numbers about damp depressions in the prairie and on the sandy- 

 borders of several shallow ponds. 



MESTOBKEGMA Scudder." 

 Mestobregma plattei (Thomas). 



Austin Bluffs, Colorado Springs, Colorado, Aug. 18, 2 9 . Garden of 

 the Gods, Colorado, Aug. 23, 1 9 . 



But three specimens of this species were seen, although much time 

 was spent searching for additional specimens. The insects were 

 found around stunted pines and bushes growing on cliff-like outcrop- 

 pings in both localities. One specimen had just emerged. The 

 flight of this species is low but swift. 



Mestobregma kiowa (Thomas). 



Mammoth Hot Springs, Yellowstone Park, top of bare hill opposite 

 Devil's Etchen, Aug. 5, 1 9 . Prairie land, Colorado Springs, Colo- 

 rado, Aug. 18, 2 d^, 3 9 . Austin Bluffs, Colorado Springs, Aug. 18, 

 1 9 . Knob Hill, Colorado Springs, Aug. 17-22, 41 c?, 40 9 . Mani- 

 tou, Colorado, Aug. 16 and 23, 3 d^. Garden of the Gods, Colorado, 

 Aug. 17, 15 d", 11 9 . Roggen, Weld Co., Colorado, Aug. 24, 1 9 . 



This large series exhibits the usual amount of variation in macula- 

 tions seen in this species, chiefly in the intensity of those on the head 

 and pronotmn and in the line between the discoidal and anal areas of 

 the tegmina. One female from Knob Hill has the anal area of the 

 tegmina sub-roseate. 



" The authors cannot agree with Prof. Brunei's suppression of the genus 

 Mestobregma {Ent. News, XVI, pp. 259-260) on the grounds that the insect on 

 wliich it was erected was not (Edipoda plattei Thomas, as stated by Scudder, 

 but one later described by Saussure as Psinidia (Trachyrhachis) parda- 

 lina. Granting this to be so, the action of the author, and not his intention, 

 shoiild alone be considered, and as Mestobregma was based on (Edipoda plattei 

 Thomas, regardless of material in hand, it should rest on that specific name. 

 The question of the apphcation of the bird genus Ixoreus Bonaparte is a parallel 

 case, for discussion of which see Sclater, Ibis, 1903, p. 142, the final ruUng on 

 which case by the American Ornithologists' Union (Committee on Nomenclature 

 (vide Auk, XXI, p. 424) being similar to the opinion expressed above. 



