June, 1920.] 



Davis: North American Cicadas. 



123 



branes at the base of the fore wings are white. In the Am. Museum 

 of Natural History there is a male labeled " California." The uncus 

 is tapered gradually to the upturned point ; membranes at base of fore 

 wings white; fore femora black, upper surface with longitudinal 

 chestnut colored stripes. 



Neoplatypedia constricta new species. Plate V/fig. 13. 



Type male and allotype female from Trumble Mountain, Mohave Co., 

 Arizona, 1919 (J. A. Crosby). Davis collection. 



Resembles Neoplatypedia ampliata in size and general coloring, but may 

 be separated by the following characters : The uncus instead of being evenly 

 narrowed to the extremity is constricted about one third of the distance from 

 the tip ; when seen in profile the uncus is not so suddenly upturned, and though 

 bent upward the curve is more gradual. The head is narrower across the 

 eyes than in ampliata. In the male the abdomen when viewed from above is 



(3D 



NfOPLATYPEIllA CONSTRICTA 



rather suddenly constricted beyond the sixth segment, whereas in ampliata it 

 tapers more evenly to the end of the body. In the female allotype the notch 

 in the last ventral segment reaches nearly to the base of the segment and is 

 wider open than the notch in the female ampliata examined from Mary's River, 

 Oregon. Fore femora black or nearly so, except at the extremities. Mem- 

 branes at base of fore wings orange ; in ampliata they are white or yellowish 

 white. The supra-antennal plates, a median line on the pronotum, narrow 

 hind edge of the pronotum, and sides of the mesonotal X posteriorly, are pale, 

 as is usual in Platypedia. 



Measurements in Millimeters. 



Male Type. Female Allotype. 



Length of body 18 18 



Width of head across eyes 5.25 6 



Expanse of fore wings 42 44 



Length of valve 4 



