SIALIS. 187 



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. 



Hob. 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 1J 

 millim. 



Hal. Georgia (Abbot). 



SECTION II. NEUROPTERA. ERICH. 



FAM. VII. SIALINA. 



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

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

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

 bulated mouth. 



SIALIS LATKEILLE. 



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

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

 the fourth article of the tarsi dilated, bilobed. 



The larva is aquatic ; with lateral branchiae. 



