KO. 2242. MORPHOLOGY OF THE STREPBIPTERA—PIERCE. 477 



The buccal area is inflated with a tiny mouth opening. The anterior 

 m\d. median coxae are elongate and grooved on the inner side; the 

 posterior coxae are only half as long as the others and so attached 

 that, from a straight ventral view, the attachment can not be seen. 

 The femora and tibiae are subequal, the anterior pair being shortest; 

 the median and posterior tibiae are dorsally grooved. The median 

 and posterior tarsi have the first joint mucronate at tip; all tarsal 

 joints are pulvillate beneath. 



The prothorix consists of a single notal sclerite and two small 

 sternal pieces (each composed of sternellum-[-precoxale-|-trochantin) 

 to Avhich the coxae are attached. The mesonotum has two dorsal 

 sclerites, a diagonal pleiiriim and a small sternum. The praescutum 

 is subtriangular ; the scuti are narrowly connected by a separate 

 scutal area ; scutellum is transverse quadrate with pedunculate pos- 

 terior angles. In front of the praescutum is evidence of a small 

 piece, probably the pretergite. In front of the wing is the oval 

 prealare area. Lying over the posterior edge of this is one of the 

 tiny sclerites to Avhich the wing is attached. The parascutellum is 

 oval, oblique. The tiny wing sclerites visible between this and the 

 prealare are rather too difficult to differentiate at present. Below the 

 postscutellum is the elongate pleurotergite, which is hooked at the 

 front where it touches the parascutellum. The epimeron consists of 

 a nonchitinized area beneath the parascutellum and a more or less 

 faintly divided chitinized area behind this, with a heavily chitinized 

 crescentiform area at the apex, to which the coxae are attached. Be- 

 Jieath the prealare and front part of the epimeron is the episternum, 

 which is diagonally divided. The sternum consists of a narrow pre- 

 sternum and a A^ery large elongate sternal area irregularly divided 

 into an anterior partly chitinized yellow eusternum and a posterior 

 chitinized sternellum, the posterior edge of which covers the insertion 

 of the coxae. The sternellum is medianly divided almost to base. 



The eighth abdominal segment is greatly prolonged beneath the 

 ninth. The ninth segment is prolonged as usual beneath the tenth, 

 with the oedeagus at its tip. The tenth segment is a small flap aris- 

 ing from the cup of the ninth in front of the oedeagus. 



r^/pe.— Cat. No. 21455, U.S.N.M. 



40. Genus STENOCRANOPHILUS Pierce. 



Stenocranophilus Pierce, 1914, Proc. Ent. Soc. Wash., vol. 16, pp. 126-127. 



The original description is as follows : 



Male. — Head excavated behind, seen from above consisting of 

 a narrow arcuate rim supporting the eyes and produced considerably 

 in front of these to form the tip of the sulcate frontal projection, at 

 the sides of which the antennae are inserted. Eyes very large, 

 convex, reaching and touching the base of the elytra. Mandibles 



