1909.] NATURAL SCIENCES OF PHILADELPHIA. 445 



The species has previously been recorded from San Bernardino, 

 Colton, Claremont, Los Angeles, Rubio Wash, Anaheim, San Diego, 

 Coronado and Cahon Pass. 



Conozoa behrensi Saussure. 



A series of fifty-nine specimens is now before us, distributed as fol- 

 lows: Altadena, August 25 (Poling), nine males, sixteen females; 

 Pasadena, August 1, fifteen males, five females; Alamitos Bay, July 

 31, five males, five females; Tia Juana, August 16, one male, two 

 females; Cottonwood, September 9, one male; Tracy, Alameda 

 County, August 30, one female. There is considerable individual 

 variation in size in both sexes, the extremes of the series of females 

 from Alamitos Bay, for example, measuring as follows : 



Length of body, 26 mm. 30 mm. 



Length of pronotum, 5.1" 7 



Length of tegmen, 25.2 " 30 



Length of caudal femur, 14.8 " 17.8 " 



In color numerous shades of umber, gray-brown, dull ferruginous 

 and occasionally pale ochre occur as the principal value, the macula- 

 tions being very pale in some individuals and strongly marked in 

 others. The coloration of this insect appears to be profoundly modified 

 by its environment, an individual from the sandy Arroyo Seco at 

 Pasadena being in the pale ochre phase. The tegminal maculations 

 are as a rule quite distinct, though varying considerably in length, the 

 width, however, showing but little variation, while the positions of 

 the bars appear to be fixed. 



The fuscous band of the wing varies considerably in width and 

 intensity, while the depth of the yellow color of the disk is distinctly 

 variable. The caudal tibise are purplish pink in some specimens and 

 vermilion in others, the latter in by far the greater majority of the 

 specimens. The very pale Arroyo Seco specimen has the caudal 

 tibise rather dark flesh color, yellowish toward the base, no blackish 

 genicular patch present. The latter is strongly marked in the 

 majority of the specimens. 



At Tia Juana the species was found in a dry river bottom, some of 

 the Pasadena individuals being from a similar situation, while at 

 Alamitos Bay it frequented scant vegetation on the beach dunes. 

 Its occurrence at Cottonwood in typical Mohavan surroundings is 

 rather surprising as the species is only .known elsewhere from the San 

 Joaquin Valley and the slopes and valleys facing the Pacific. 



