SIALIS. 18t 



destroyed) ; wings hyaline ; pterostigma small, black, terminated 

 with a white nervule at each end ; membranule white ; seven ante- 

 cubitals ; five postcubitals ; one discoidal areolet, then two. 



Length 18 ? millim. Alar expanse 30 millim. Pterostigma 1 

 millim. 



Hah. North America (Vienna Museum) ; Baltimore and New 

 Jersey (Uhler); Maine (Packard) ; Connecticut (Norton). 



2. N. maculosa! 



Nannophya maculosa Hagen ! 



Fuscous ; mouth black, nasus white, front chalybeous, each side 

 with a white spot; thorax fuscous, each of the sides with obsolete, 

 yellow spots ; feet black ; abdomen brownish-black, segments each 

 side with a triangular, yellow spot, the three apical segments 

 brownish-black ; appendages white ; wings hyaline, base of the 

 posteriors fulvo-fuscous ; pterostigma small, yellow ; membranule 

 white. (Male.) Eight antecubital veins ; five postcubitals; one 

 discoidal areolet ; two at the triangle. 



Length 20 millim. Alar expanse 31 millim. Pterostigma 1^ 

 millim. 



Hah. Georgia (Abbot). 



Section II. NEUROPTERA. Erich. 



FaxM. YII. sialina. 



Body short, thick; prothorax large; antenna3 long, seti- 

 form; wings large, reticulated, posterior ones with the anal 

 space plicated ; tarsi 5-articulate. The larva with a mandi- 

 bulated mouth. 



SIALIS Latreille. 



Prothorax quadrangular, almost equal to the head; no ocelli; 

 antenmfi filiform; the wings irregularly reticulated, the veins stout; 

 the fourth article of the tarsi dilated, bilobed. 



The larva is aquatic ; with lateral branchiae. 



