PTEEOCALLIS ALNI. 31 



Genus XYII.-^PTEHOOALLIS,* Passermi. 



Eostrum stout and short, scarcely reaching beyond 

 the first coxae. 



Antennae shorter than in Callipterus, six-jointed, 

 the usual seventh joint being represented by a sudden 

 thinning off of the extremity of the sixth. 



Cornicles small and tubercular. 



Wings rather shorter than in Callipterus. The 

 membrane sometimes clouded or brocaded. 



Passerini gives as a character, " Alarum anteriorum 

 venaB obliquse apice in maculam fuscam amplam- 

 triangulam dilatatge." 



Pteeocallis ALNI, Fabr. Plate XCII, figs. 1- — 4. 



AjjJiis alni, Fabr., De Geer, Kirby and Spence, 



Kalt., Walk. 

 Callipterus alni, Koch. 

 Pterocallis aim, Pass. 



A'pterous viviparous female. 



Oval, transparent, pale green ; blotched at the sides 

 and across the dorsum with dark green. Body some- 

 times wholly pale green and without blotches. Eyes 

 warm brown. Antennae whitish, with the tips of the 

 last three joints black. Abdomen carinated and 

 covered with tubercles, from each of which tufts of 

 hair rise. Cauda obtuse. Cornicles very small, green 

 in the young individuals, but tipped with black in the 



* From iTTtpov, a wing, and kuWos, beautiful. 



