426 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 54. 



Behind the transverse fold is the scutellum and at the apex folded 

 in, is the transverse postscutellum. The posterior angles are elon- 

 gate, passing beneath. Below the attachment of the clavate elytra 

 the pleuri are greatly inflated, lobate, with the anterior margin 

 granulate, three edged, and immediately below a small elytral hook. 

 The sternum is divided into four parts, the pleurum is fused into 

 one. The anterior piece on the median line is a very narrow trans- 

 verse strip (eusternum) enlarging very greatly toward the side. 

 This latter area is strongly depressed and distinctly margined be- 

 hind by the inner edge of the pleural lobe. The depression becomes 

 deepest at the acute posterior corner and appears to be diagonally 

 cleft to form a spiracular opening. In fact on focusing, the trachea 

 can be seen terminating practicallj^ at this cleavage. The pleural 

 area (trochantin-j-episternum-l-epimeron) behind the angle of the 

 so-called spiracular orifice narroAvs into a curved hook to which the 

 coxa is attached. Behind the eusternum the sternellum is medially 

 divided by a strong inverted T as on the presternum. The post 

 sternellum is a transverse area behind the sternellum. The coxa 

 appears as a small basal piece to the trochanter. The legs are as in 

 pronotum. 



Metathorax almost four times as large as prothorax and meso- 

 thorax combined. Notum consists of praescutum, prelare, scutum, 

 scutellum, postlumbium and postscutellum. The praescutum is con- 

 vex on anterior margin and lies entirely in front of the scutum. 

 Scutum is narrowly connected with praescutum at apex of scutellum. 

 A faint line on each side separates the suralare. Scutum is divided 

 to form parascutellum by a line from base of wing. Scutellum is 

 elongate subtriangular. 



Opposite the base of the scutellum on the epimeron there is a tiny 

 lobe, to which is attached the axillary cord. This is a detached part 

 of scutellum. Behind this little piece the epimeral area is enlarged 

 and continues unbroken to the coxae and behind them, and is fused 

 with the sternellum in front of the coxae. This large area may be 

 called hypoepimeron to the coxae, and postcoxale behind them. A 

 faint color line separates presternum from eusternum, and a faint 

 fold the eusternum from sternellum. The coxae are conical pieces 

 and are contiguous on the median line. The trochanters are shorter 

 than for the other two pair. Femur, tibia, and first tarsal joint 

 are elongate. 



The first abdominal spiracle is distinctly on the first abdominal 

 segment, but near the edge of the hypoepimeron. 



The oedeagus is slightly sinuate, acute. 



The wings have a faint indication of the third anal vein, so the 

 generic description is changed in the key to read with eight primary 

 veins. This is made clear in the drawing of the venter which shows 

 the bases of the wings. 



