85 



the ends of the transverse portion of the sclerite. Each 

 pilifer bears on its inner margin a row of short bristly hairs, 

 light brown in color. There is also to be made out a very 

 small, triangular piece projecting cephalad from the middle of 

 the transverse portion of the labrum. This is the epipharynx. 



Mandibles. The mandibles are wanting in Anosia. (They 

 are present in an aborted condition in some Lepidoptera; 

 and in one genus of small moths, Eriocephala, are present 

 and functional, constituting, with the maxillae which are not 

 produced into a sucking tube, true biting mouth-parts.) 



Maxillae. The long, coiling, sucking tube of Anosia (as 

 of all the Lepidoptera possessing functional sucking mouth- 

 parts) is composed of the greatly extended, opposed, termi- 

 nal portions of the maxilla. In addition, there is a fixed 

 basal part of each maxilla, which cannot be divided into 

 tardo and stipes. This basal part, shining brown, extends 

 caudad and ventrad, partially bounding a cavity lying be- 

 tween it and the labium. The sucking tube consists of two 

 lateral portions, each portion representing a maxilla. These 

 parts are convex outwardly and concave inwardly. By the 

 opposition of the two concave aspects, a complete central 

 tube is formed. The maxillary palpi are wanting in Anosia, 

 and in most of the butterflies, although present in a one- or 

 two- or even several-segmented condition among most of 

 the moths. 



Labium. The labium is a fixed, semi-membranous sclerite, 

 triangular in outline, with its apex projecting cephalad and 

 joining the maxillar proboscis at its base. The labial palpi 

 are large, three-jointed, and covered with scales, and normally 

 project cephalo-dorsad. They are inserted on tumid spaces 

 on the base of the triangular labium, and the first joint is 

 pedicellate. 



Make a drawing of the cephalic aspect of the head show- 

 ing the fixed and movable parts. 



