UIMBNOPTERA. 241 



Myzine, Lai., 

 Where the mandibles are dentated *. 



Meria, Illig., 

 Where they are not dentated f . 



Sometimes the second joint of tlie antennae is exposed, as in Sco- 

 hiA proper, or 



ScouA, Fab-X 



2. Those Fossores in wliich the first segment of the thorax is 

 formed as in the preceding ones, where the legs are still short, but 

 slender, and neither spinous nor strongly ciliated, and where the an- 

 tennsB in both sexes are at least as long as the head and thorax. 



Their body is usually smooth, or but very slightly pubescent. This 

 subdivision embraces the family of the Sapigytes of Latreille, a name 

 derived from that of the principal genus 



Sapyga. 

 In some the antennae are filiform or setaceous, as in 

 Thynnus, Fab,, 

 Where the eyes are entire §. 



PoLOCHRUM, Spin., 

 Where they are emarginated, and the mandibles, besides, multi- 

 dentated ||. 



In the others the antennae are thickest at the extremity, or in some 

 males even clavate. Their remaining characters are those of the 

 Poloclfra. Such is Sapyga proper, or 



Sapyga, Lat. 



These Insects flit about trees and walls, exposed to the heat of the 

 sun, and appear to deposit their eggs there ^. 



The Ceramii of Latreille, according to the form of the first seg- 

 ment of the thorax and their extended or applicated wings, belong to 

 this subdivision ; but more important affinities place them in the family 

 of the Diplotera. 



3. Fossores still allied to the preceding in the extent and form of 

 the first segment of the thorax, but in which the posterior legs are at 

 least as long as the head and trunk, and the antennae are most fre- 

 quently slender, formed of elongated, lax, or but slightly compact and 

 sliongly arcuated or curled joints, at least in the females. 



* Lat., Gener. Crust., et Insect., IV, 116. Van der Linden. 



t Lat., Ibid. ; Van der Linden. 



X Lat., Ibid. ; Fab. See also the Monograph of the Fossores by Van der Lijiden. 



§ Lat., Ibid. The ScotceiKt of Kliig appears to me to differ but slightly from the 

 Thynni ; they have the same kind of antennae, similar wings, the first rubital cell 

 also traversed by a small line, Ike. The anus of the males is slightly recurved, a cha- 

 racter which approximates them to Tengyra, and various other divisions of the pre- 

 ceding division. 



11 Lat., Ibid. ; Van der Linden. 



^ Lat., Gen. Crust, et Insect., IV, p. 110 ; Van der Lind. 



