REVISION OF MOTHS OF CARPOSINIDAE 9 



ventral margin of the tegumen. Occasionally the lobes become greatly 

 extended (as in C. niponensis ottawana) and equipped with strong tufts 

 of setae. Both halves of the gnathos are fused together in Tesuquea 

 hawleyana, thus resembling the common condition found in several 

 families of Lepidoptera which possess this structure. The complete 

 absence of a gnathos in Bondia provides one of the better characters 

 for separating this genus from Carposina. 



A subscaphium is presently known to occur m only one American 

 species, Atoposea maxima. Furthermore, such a structure has not been 

 reported in any Old World species. 



A curious structure present in the adeagus of several New Zealand 

 Carposinidae and referred to as the vitta by Philpott (1928) apparently 

 does not occur in any American species. The vitta is an elongate, 

 ribbonlike filament extending from one of the apical lobes of the 

 aedeagus. Usually its length either equals or exceeds that of the main 

 body of the aedeagus. The function of the vitta is not known, but 

 likely it assists in sperm transfer. 



Female genitalia. — Frequently the ductus bursae, or certain 

 portions of it, are provided with heavily thickened walls. This feature 

 is especially prevalent in Carposina and in several Old World genera 

 such as Anomoeosis and Meridarchis. In the American species, usually 

 only the caudal third or fourth of the ductus is strongly dilated and 

 thickened. For this reason I have used the term antrum and have 

 referred to the remaining, more constricted portion of the tube as the 

 ductus bursae even though the antrum is technically a part of the 

 ductus. Under high magnification the walls of the antrum usually 

 may be observed to resemble a fine reticulum composed of thousands 

 of relatively large cellular partitions. Over most of the antrum these 

 cells are formed as small, columnar papillae. Frequently they are 

 crowded so tightly together that tlieu* walls assume a hexagonal out- 

 line typical of cells in such dense situtations. Anterior to the antrum 

 the cells gradually become more flattened (i.e., less papillose), thimier 

 walled and more rounded. In no case were they observed to extend 

 very far beyond the anterior end of the ductus bursae. 



Little variation has been observed in the structure or condition of 

 the signum. This featm-e is either completely absent or, if present, 

 then represented by a strongly furcate and approximately symmetrical 

 pair. Each ramus is compressed, slightly curved, and serrated along 

 its concave edge. The only significant variation noted in the American 

 species was in Carposina bullata where one ramus of each signum may 

 occasionally be subdivided. 



Frequently present in the corpus bursae of most females are one 

 and less commonly two or three rather large spermatophores. Al- 

 though the overall structure of the spermatophore does not appear 



