JAMES A. G. REHN AND MORGAN HEBARD 



313 



Measurements {in millimeters) of extremes 



Arizona. ...(2), 5.4-5.7 31-33.9 [ 6-6.2 38.1-39.725.4-26.16.4-6.7 

 Sycamore Can- I ; I [ 



yon, Ariz... (2)' 5.6-5.7 34.8-35.4! 6.1-6.5 42.3-42.427.9-28.3 6.9-7 

 Cuernavaca, i I j 



Mexico (8): 5.4-5.7 32.7-33.1 6.1-6.8 39.4-41.1 



1 I 



24.8-27 6.1-6.2 



Normally uniform green in general coloration the series before 

 us contains a few specimens which exhibit a more or less marked 

 brownish suffusion. The lateral angles of the pronotum though 

 usually immaculate are in a few specimens heavily outlined in 

 yellowish. 



The series before us from Cuernavaca shows that the variation 

 in the present species is chiefl}^ individual, the majority of speci- 

 mens from that locality, however, approach the minimum meas- 

 urements. 



Intermediate material between S. furcata furcata and S. f. fur- 

 cifera was found at BroA\Tisville, Texas, by the authors, attracted 

 to light at night in great numl^ers; the series before us of f he i:)resent 

 species from Cuernavaca shows that it responds similarly to 

 lights at night. 



In its northernmost distribution the present insect is found in 

 the United States in the Chisos Mountains in Texas, in south- 

 eastern Arizona as far north as Fort Grant and on the California 



TRANS. AM. ENT. SOC, XL. 



