GENUS PHAL^ENA. 103 



Section I. BOMBYX. The antennae are filiform, 

 with two compressed reflected feelers ; the tongue is 

 short and membranaceous, obtuse and bifid ; the cater- 

 pillars have sixteen feet, often hairy ; and the pupa 

 is pointed at the tip. This section is subdivided as 

 follows : 



a. with the wings expanded. 



b. with the wings reversed. 



c. with the wings deflected. 



d. with the wings incumbent. 



e. with the wings convolute. 



Section II. GEOMETRA. The antennae are filiform; 

 the feelers are cylindrical ; the tongue is projected, 

 membranaceous, setaceous, and bifid ; the larva have 

 from eight to ten feet, six of which are pectoral, two 

 caudal, and sometimes two subcaudal ; the pupa have 

 pointed tips. The following are the subdivisions of 

 this section : 



a. the antennae are pectinated. 



b. the antennae are setaceous. 



c. the wings are forked and connivent. 

 Section III. NOCTUA. The antennae are seta- 

 ceous; the feelers are compressed and hairy, with 

 the tip cylindrical and naked; the tongue is pro- 

 jecting, horny, setaceous, and bifid ; the larva has 

 sixteen feet ; the pupa is pointed at the tip. The 

 following are the subdivisions of this section : 



a. with the wings expanded. 



b. with the wings flat and incumbent, and the 



thorax smooth. 



