472 Report of the Department of Entomology of the 



bites and pulls at the thoracic gland, and at intervals stops to rest. 

 During such a pause the male often resorts to singing as if to hold 

 further the attention of the female. After she has fed on the gland 

 for a half hour or more the male reaches back with his abdomen 

 and simultaneously she bends her abdomen downward. He then 

 protrudes a pair of small chitinous hooks, and with his cerci on each 

 side of the ovipositor as guides, inserts these structures into a small 

 notch at the end of the subgenital plate. This enables him to push 

 the barbed capillary tube of a spermatophore into the opening. The 

 abdomen is withdrawn and the spermatophore remains hanging. 

 The latter is a white, hard, ovoid body about .85 mm. long with 

 a central cavity filled with spermatic fluid, and opening out through 

 a fine tube about 1.4 mm. long bent in the form of a hook. The 

 sperms flow out through this tube into the seminal receptacle of 

 the female. Following this act the female continues to feed at the 

 dorsal gland for a quarter or half an hour. If she starts to crawl 

 away the male renews his singing, apparently in an endeavor to 

 dissuade her from departing from him. When she finally leaves 

 she selects a secluded spot where seemingly she will not be disturbed. 

 Later she arches up the back, bringing the tip of the abdomen 

 forward beneath, and then reaches back with the head and removes 

 the spermatophore. She straightens out again and proceeds to eat 

 the capsule in a leisurely way. She then doubles up again and 

 works at the ovipositor with her mouth, starting at the base and 

 continuing out toward the tip, as if endeavoring to clean this organ. 



oviposition. 



For this operation the female selects a suitable spot on a tree or 

 bush and prepares to oviposit by first chewing a small hole in the bark, 

 choosing the upper side of a branch in preference to the lower side, 

 and working with the head uppermost when on a sloping or vertical 

 surface. Upon the completion of the cavity she then walks forward 

 a little, arches her back so as to bring the ovipositor about perpen- 

 dicular to the branch and begins moving it up and down until she 

 strikes the hole. She then starts to drill by giving the ovipositor 

 quick thrusts and at the same time slowly turning it around by 

 twisting the abdomen thirty or forty degrees to each side. (Plate 

 XXIX, fig. 2.) As the ovipositor is forced in it takes a more or less 

 oblique course, according to the thickness of the bark, so that the 



