1910] North American Paniscini 193 



The genitalia of the male protrude prominently between and 

 beyond the last dorsal and ventral plates of the abdomen. The 

 last segment in the males being noticeably shorter than the 

 others, while in the females the last two are noticeably shorter. 



All of the ventral segments of the abdomen are rather soft 

 and membranous. The claspers are large and broad. 



WINGS. 



The wings are quite large and colorless, with the exception 

 of a yellowish tinge, produced by the presence of reddish brown 

 nerves and numerous short hairs, generally distributed over 

 both the upper and under surfaces. Cresson's nomenclature 

 of wings is the one used in this paper. 



FORE WING. 



Separating the marginal, or radial cell, from the median. 

 or externo-medial cell, is a well-developed stigma, which is 

 long, narrow and yellowish brown in color. It is considerably 

 wider beyond its middle than before. The marginal or radial 

 cell is lanceolate. The greater part of its anterior and longer 

 side is formed by the costa and its remaining basal portion by 

 the stigma. Posteriorly it is separated from the disco-cubital 

 cell by the first abscessa of the radial nervure which runs from 

 the stigma to the apex of the small triangular areolet. It is 

 separated from the third submarginal cell by the second abscessa 

 of the radial nervure. which is longer than the first, and is quite 

 strongly bent at its origin where it forms approximately a right 

 angle with the radial nervure. The median cell which is one of 

 the largest of the wings is about four times as long as its greatest 

 width. This latter dimension, occurring about three-fourths 

 of the distance from the base of the wing to the outer end of the 

 cell. It is separated from the sub-median cell posteriorly by 

 the externo medial nervure and from the disco-cubital beyond 

 by the basal nervure. The third side is formed by the costal 

 and sub-costal nervures fused. 



The costal cell is absent due to the fusing of the costal and 

 sub-costal nervures, the sub-costal portion being however, more 

 prominent than the costal. The disco-cubital cell which is 

 probably the largest cell of the wing is irregular in outline, is 

 bounded by five different nervures, namely, first abscessa of the 

 radial, first transverse cubital, disco-cubital, discoidal and basal 

 nervures. and a portion of the stigma. 



