110 Journal New York Entomological Society. ["^'°1- xxv. 



a number of short hairs near the apical end. Just beyond the ex- 

 tremity of the lateral margins of the penis sheath there is on each 

 side a pair of small openings or pores on the dorsal surface. The 

 posterior one on each side is slightly interior to the anterior one and 

 is oval in outline, while the anterior one is circular. Between these 

 two pairs of pores a small number of minute hairs can be distin- 

 guished. Viewed from the ventral side (Plate VIII. fig. 2), the pos- 

 terior margin of this apical segment is observed to be broadly rounded 

 and slightly sinuate and to extend beyond the dorsal posterior margin 

 so that only a small portion of the claspers is visible when the latter 

 are in their normal resting position. Before this posterior margin, 

 laterally are small areas of anteriorly directed short hairs. 



In several common species of Tingidae that I have examined I 

 find that claspers similar to those here noted are borne on the genital 

 segments of the males. 



In the female, the apical end of the abdomen is broadly rounded. 

 On the ventral side is situated the ovipositor (Plate VIII, fig. 3). This 

 originates with its base below or within the antepenultimate segment 

 and extends posteriorly with the tip resting in the apical segment and 

 the whole inclosed in a groove closely fitted to it and open along the 

 center line. One pair of membrane-like edges meeting along the 

 center cover and enclose the ovipositor from the base of penultimate 

 segment to the apex of the abdomen, while a second and similar 

 covering overlays this one in the penultimate segment. This second 

 covering may be considered as a paired outfolding of the chitinous 

 membrane of this segment which has been pressed over so as to 

 meet in a line extending over the ovipositor. The position of the 

 ovipositor in its groove and the covering membranes may be better 

 understood by noting the cross-section view. 



The ovipositor as seen in cross-section (Plate VIII, fig. 4) consists 

 of two parts, an upper u-shaped piece and a lower paired piece. The 

 upper piece is thin at the top with its side parts broadening out and 

 having each on their ventral surfaces an acute ridge. The paired 

 parts of the lower piece are somewhat triangular in outline with a 

 groove in the dorsal side of each which fits the acute ridge of the 

 side piece of the upper part of the ovipositor. The two parts of the 

 organ are thus able to move on one another. The paired pieces of 

 the lower part, moreover, are united by a thin membrane which ex- 



