METHOD OF DISSECTING CONORHINUS 497 



The four Malpighian tubes enter the gut just anterior to the commence- 

 ment of the rectum. 



The salivary apparatus resembles that of the bed bug, to be described 

 in more detail further on, and consists of two pairs of glands with fine 

 ducts and a salivary pump. The posterior pair of 



glands, corresponding to the cardiac glands of Cimex, ary 



sipps&rsitus 



are small oval bodies situated on each side of the pro- 

 ventriculus, to the wall of which they are attached by some delicate 

 fibres (Plate LXII, fig. 10). The anterior pair, corresponding to the 

 ovoid glands, are slightly larger, and lie free in the anterior end of the 

 abdomen. The delicate ducts of these glands have not been traced 

 through the neck; in the head they are found lying one on each side of 

 the salivary receptacle, eventually fusing to form a short median common 

 duct. As in the bed bug, there is some doubt as to the ultimate course 

 of the duct of the ovoid gland, which divides into two branches 

 shortly after its origin from the gland. The salivary receptacle or pump 

 (Plate LXIV, fig. 6) is a remarkable and interesting structure. It 

 consists of a small conical chitinous chamber, opening by an elongate 

 channel, with a fimbriated margin, at the point at which the mandibles of 

 the two sides, come in contact with one another, and closed posteriorly 

 by a stout piston rod, which is connected with the broad distal end of 

 the chamber by a stout but flexible membrane. On each side of the cham- 

 ber there is a stout rod of chitin, loosely attached to the ventral wall of 

 the pharynx ; these are connected with the piston rod which lies between 

 them by a series of obliquely directed muscles, the result of the contrac- 

 tion of which will be to withdraw the rod from the chamber, and there- 

 fore to draw up the saliva from the glands. 



The female organs of reproduction are of a simple type, and present 

 none of the extraordinary features which are found in Cimex. Each 

 ovary consists of seven ovarian tubes, each of which, 

 in the mature female, shows four follicles ; at the time 

 the lowest follicle contains a ripe egg the one next above is also approach- 

 ing maturity, so that the second batch of eggs can be laid a very short 

 time after the first. On each side of the common oviduct there is a 

 small white or cream coloured spermatheca, shaped very much like the 

 haltere of a Dipterous fly, but with a much stouter stalk. The sper- 

 mathecae are filled with a dense mass of large sickle-shaped spermatozoa. 

 Conorhinus is best dissected by the following method. Cut off the 

 egs and wings as close to the body as possible, and then take the bug 

 between the finger and thumb of the left hand. Take a pair of fine 

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