454 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los ; 



i 



(two united epiprocts of Tjeder, 1954, p. 32) weak middorsall}^, bear- 

 ing long setae, broad and of distinctive shape (Climacia), or a small,! 

 transverse band bearing a small group of trichobotbria, and with long 

 setae (Sisyra)] tenth sternite almost striplike, posterior and postero- 

 ventral to tenth tergite, bearing long setae and broadening ventrally* 

 {Climacia) or moved dorsally and divided into a basal plate (gonarcus 

 of Tjeder, ibid., p. 28) and a distal pair of claspers (entoprocessus of 

 Tjeder, ibid., p. 30) (Sisyra); internal genital armature reduced; 

 parameres between lateral halves of ninth and tenth tergites and abovei 

 ninth sternite partially fused (Climacia) or free in the form of two; 

 sclerotized rods below basal plate (Sisyra); small, thin, V-shaped, 

 keellike, transparent internal hypandrium present usually abovei 

 eighth sternite and proximal portion of ninth sternite (Sisyra, similar 

 to that of Hemerohius) (fig. 13, a, d). 



Abdomen of female with first seven segments similar to those of 

 male; genital tergites and sternites more similar in different genera 

 and species in general than those of male, eighth tergite usually 

 considerably developed laterally, broken middorsally and most often 

 appearing fused midventrally (uncertain in Sisyra panama, Sisyrina) 

 resembling a sternite, eighth pair of spiracles opening in the tergite; 

 eighth sternite greatly reduced to a minute subgenital plate lying! 

 ventral to genital opening and between and ventral to bases of lateral 

 halves of ninth tergite, called the gonapophyses (Killington, 1936, j 

 p. 64) with two elongate, lateral, posteriorly directed processes (fig. 

 24, b) ; ninth tergite divided into two large plates, moved lateroventrally 

 to tenth tergite, with one or two thickened ridges err apodemes (usually 

 posterior only, but both anterior and posterior present in Sisyra 

 vicaria) for articulation with ninth sternite; ninth sternite elongate, , 

 movable, divided, attached ventrally to articulation ridge of ninth 

 tergite, apex acute; tenth tergite entu-e, sometimes weakened mid- 

 dorsally, a transverse plate with a group of trichobotbria, similar to > 

 that of male; genital pore located ventrally between the lateroventral 

 halves of the ninth tergite. 



The anus opens between the lateral portions of tenth tergite in the 

 male, and in membrane just bej^ond tenth tergite in the female. The 

 cement gland is long and oval with a short, slightly swollen duct 

 in the female. In the male, the testes are fused and enclosed m one 

 yellow oval scrotum (the shape sometimes varying) as in Osmylus 

 (Withycombe, 1923, p. 524; 1925, p. 388), with the two vasa efferenti 

 coming ofl' from this ventrally at about the middle, or somewhat 

 posteriorly. Vesiculae seminales are large and considerably lobate, 

 but of a slightly different form from those of Osmylus. The remaining 

 anatomy is of a neuropterous type in general. 



