190. 

 PERLA CEPHALOTES. 



Order Neuroptera. Fam. Perlidae Nob. — Perlides Lat. 



Type of the Genus Phryganea bicaudata Linn. 

 Perla Geoff., Lat., Leach. — Semblis Fab., Panz. — Phryganea Li?in. 

 Antenna; remote, inserted before the eyes close to the base of 

 the mandibles, about the length of the body, setaceous, com- 

 posed of numerous joints, basal joint large, 2nd smaller, the re- 

 mainder increasing in length to the apex, being transverse to- 

 wards the base, and obovate at the extremity (fig. 1). 

 Labrum transverse, linear and pubescent (2). 

 Mandibles small, produced internally, pilose externally, acute at 

 the apex, sometimes furnished with 2 short spines (3). 

 Maxilhe small, bilobed, internal lobe producing a few hairs and 

 slightly notched, external much longer, narrower, and lanceolate, 

 having an obscure mark of articulation at the apex. Palpi lonsj, 

 subsetaceous slender and pilose, 5 -jointed, basal joint minute, 

 2nd the most robust, 3rd rather the longest, 4th nearly as long, 

 5th not longer than the 2nd (4). 



Mentum large, covering the underside of the head, transverse 

 sublunulate. Lip subquadrate, producing a fleshy lobe at each 

 of the anterior angles. Palpi not long, 3-jointed, pubescent, 

 joints of nearly equal length, the basal one the most robust, ter- 

 minal the slenderest (5). 

 Males sometimes smaller than the females. Trophi submembranous. 

 Head horizontal, transverse ovate, very much depressed. Eyes la- 

 teral, not large but prominent. Ocelli 3 in triangle, hinder ones the 

 largest [l a). Thorax subquadrate. Mesothorax a«(Z Metathorax 

 producing 2 pair of reticulated wings, incumbent and horizontal when 

 at rest, of nearly equal length, the superior being the narrowest. Ab- 

 domen short, oblong-quadrate in some, the apex furnished vnth 2 

 long articulated setce. Legs simple, longest in the males. Tibiae not 

 spined. Tarsi 3-jointed, glandular beneath, 1st and 2nd joints mi- 

 nute, 3rd long. Claws acute. Pulvilli globose {8, a fore leg). 

 Obs. The dissections were taken from a male of P. marginata. 



Cephalotes Nob. 



Male brown. Head considerably broader than the thorax, a 

 transverse ochraceous spot between the eyes, the base of the 

 same colour j thorax transverse quadrate, rugose, with a channel 

 down the middle and an elevated line on each side curved out- 

 ward. Abdomen inclining to ochre at the apex. Set* not so 

 long as the antennae. Wings scarcely so long as the body ; the 

 inferior with 2 transverse nervures in the 4th discoidal cell. 

 Female 4 times as large as the male and much broader ; abdo- 

 men frequently ochraceous, wings extending to the apex of the 

 setae, semitransparent, stained fuscous, rarely wanting the 2 

 transverse nervures in the under wings. 



In the Cabinets of Mr. Dale and the Author. 



