AKT. 17 NORTH AMEEICAlSr WEEVILS PIERCE O 



The drawings of the upper (fig. 1), side (fig. 2), and under (fig. 3) 

 views of the head are sufficient to present the essential characters of 

 this tribe and genus, which is characterized by the shortness of the 

 beak and the shape of the scrobes and eyes. Figures are also given 

 of the thoracic sternal characters (fig. 4), the mouth parts (figs. 5, 

 6, 7), the differences of the antennae in the two sexes (fig. 8), the 

 wing venation (fig. 9), the protarsus (fig. 10), the protarsal claw 

 (fig. 11), the pygidium (fig. 12), and the female genitalia (fig. 13). 



As the mouth parts of this family have not been carefully studied, 

 considerable attention will be given to them in this paper. 



The maxilla (fig. 6) is quite primitive in that it consists of an 

 elongate cardo; a basal piece to stipes; the main portion of stipes 

 strongly two lobed; the outer lobe or lacinia being provided with 

 strong double series of bristles; and the long fingerlike inner lobe, 

 or galea, which is narrowly but deeply cleft from the lacinia and 

 with a brush of bristles at tip ; the basal joint of the palpus small, 

 the second very large and quadrate, the third small, and fourth 

 elongate fingerlike. The last three palpal joints are dark brown, 

 the remainder of the maxilla is transparent yellowish. 



The mentum is a small segment to which the labium is attached 

 (fig. 7). The labium is transverse, brownish, poorly defined, dif- 

 fering only from ligula in color. The ligula is yellow, shallowly 

 bilobed. The palpi are attached on the diagonal sides of the labium, 

 three jointed, light brown. The hypopharynx or inner side of labium 

 and ligula is provided with a strong series of bristles in several 

 rows on each side of the middle. 



The wing venation (fig. 9) is in general characteristic of the 

 Khynchophora, but has its special characteristics. The costa is mar- 

 ginal and basal only. The subcosta is over twice as long and 

 apically merged with the radius which from here to the node or 

 transverse fold becomes submarginal. Behind the radius is the faint 

 outline of the radial sector. Medius is a strong vein bracing the 

 middle of the wing and at the transverse fold branches forward in 

 a hooklike process and almost at right angles behind. The cubitus 

 is a fine straight vein. At the transverse fold the radial vein is 

 badly broken and a distinct but small triangular cell is formed. Two 

 severed portions of radius appear in the apical half of the wing. 



The pygidium (fig. 12) is distinctly furrowed for the reception 

 of the elytral margin. The female genitalia (fig. 13) are provided 

 at apex with four more or less blunt teeth. The male genitalia are 

 elongate and slender. 



The third tarsal joint is bilobed and not included in the second 

 but is placed at its apex, a character found in the Bruchidae. 



