386 PROCEEDINGS OF THE ACADEMY OF [Sept., 



of which are Greeley and Pueblo, the majority being west of the 

 divide. 



This species was found among the cactus and sage in the dry bottom 

 lands of the Grand river valley. The insects were by no means 

 plentiful and were also extremely shy, 



Trimerotropis cincta (Thomas). 



Manitou, Colorado, 6,700-7,000 feet, Aug. 23, 11 6", 4 ? . 



The above series shows considerable variation in the strength of the 

 median carina of the fastigium, some individuals having it strongly 

 marked and in others it is hardly perceptible. The color of the caudal 

 tibiae is quite variable in this species, as already noticed by McNeill, 

 and the series in hand exhibits the following : ten with the distal three- 

 fourths of the caudal tibise greenish yellow, four with the same bluish 

 green, and one red. 



According to Gillette this species is found in the mountains and foot- 

 hills of Colorado at altitudes ranging between 6,000 and 10,000 feet, 

 and on both slopes of the divide. In his series of ninety-five speci- 

 mens the hind tibise were without exception bluish or yellowish on 

 the distal portion. The species has been recorded from Nebraska, in 

 addition to New Mexico and Colorado. The collection of the Academy 

 contains specimens from Salida, Manitou Park and Fort Collins (Horse- 

 tooth Mountain), Colorado. 



This species was plentiful on a path among stunted pines on the 

 upper slopes of the foothills back of Manitou. The location would 

 have made it particular^ difficult to capture specimens had not the 

 individuals apparently trusted to their protective coloration. A close 

 approach was necessary to cause them to take wing. 



Trimerotropis ferruginea McNeill. 



Daileys, Park Co., Montana, Aug. 4, 1 c?. Sphinx, Park Co., Mon- 

 tana, Aug. 4, 3 c?, 2 9 . Spire Rock, Montana, Aug. 12, 1 cJ' ("on 

 bare mountain") . Upper Geyser Basin, Yellowstone Park, Aug. 7, 4 d' . 



The specimen from Spire Rock is assigned to this species with con- 

 siderable doubt, as it is larger and has a rather different facies, but 

 does not appear to be any closely allied form. The males from Upper 

 Geyser Basin appear rather different from the Daileys and Sphinx 

 specimens, being a little smaller and more like the Spire Rock individual 

 in their somewhat more robust form, though considerably smaller size. 

 This species is probably little more than a form of bifasciata, and hardly 

 worthy of a name in view of the great amount of individual variation 

 found in most of the species of the genus. 



