46 UNIVERSITY OF COLORADO STUDIES 



Neoclylus approximatus Leconte, is to be recorded from Boulder. The onl^ previous 

 Colorado record was Morrison (Oslar). 



Orphilus ater, found at Halfway House, Pike's Peak, is new for Colorado. 



Languria lata Leconte, from Boulder, was only known previously in Colorado from 

 near Fort Collins. 



Disonycha triangularis Say, was obtained at Windy Point, Pike's Peak, 12,230 feet. 

 This is much higher than the previous records. 



COCCID^ 



THE GENUS TRIONYMUS, BERG, IN COLORADO 

 Although the Coccidae have such limited means of locomotion, many of the genera 

 are exceedingly widely distributed. In a number of cases, this can be readily explained 

 by the fact that they are carried from place to place on cultivated plants; but in other 

 instances no such explanation will suffice. The small genus Trionymus contains at 

 present four species, one found in France, one in Russia, one in the District of Columbia, 

 and the fourth was discovered last year at Boulder, Colo., by Mrs. Cockerell. It may be 

 that these insects are not all genetically related, but represent "convergent evolution," 

 due to similar modes of life; but if this is the case, we have at present no proof of it. The 

 Colorado species has been described as T. nanus Ckll. It is hardly i\ mm. long, narrow> 

 very pale yellowish, with yellowish secretion. It occurs under rocks in open grassy places. 

 The microscopic measurements (all in /x) are as follows: Antennal joints: (i) 22, (2) 

 22, (3) 18, (4) 16, (5) 12, (6) 17, (7) 56. Labium: length about 75, breadth about 47. 

 Anterior leg: femur + trochanter, 97; tibia, 50; tarsus (excl. claw), 40. 



THE GUTIERREZIA MEALY-BUG AT BOULDER 



Gutierrezia is a small perennial composite plant, exceedingly common in New Mexico, 

 and extending northward even to Montana. In New Mexico it was found to be commonly 

 infested by a small mealy-bug (Pseudococcus gutierrezice Ckll.), easily recognized by the 

 conspicuously white linear ovisac. This insect is now found to occur also in Colorado, 

 as I collected specimens this year in Boulder, near the Sanitarium. It must be regarded 

 as one of the distinctly austral elements which so plentifully mingle with the boreal types 

 along the eastern base of the mountains, and which to my mind forbid the extension of 

 the Transition zone so far east in Colorado as Dr. Merriam's map' shows. In the nature 

 of things, this question of the limits of the Transition zone must remain largely a matter 

 of opinion; but while the lower front of the mountains is unquestionably Transition, it 

 seems to me that the austral forms approach the flanks of the range in such force as to 

 entitle most of the country east of Boulder to be regarded as veritable Upper Austral. 

 The females of P. gutierrezia collected at Boulder were found to be much infested by a 

 parasitic fungus, which should be further investigated. 



A NEW COTTONY SCALE ON ROSE 



In -August, 1904, Mr. E. Bethel discovered a cottony scale on twigs of wild rose at 



Coulter, Middle Park, Colo. The female insects are rather dark brown, 2 J-2f mm. long, 



2J-2J broad, with a conspicuous white ovisac. Microscopical examination shows that 



the antennae are eight-jointed, and that the species is in many ways similar to P. amygdali 



« Bull. 10, Div, of Biological Survey. 



