63 251 



Synchæta littoralis Rouss. 



Male: Housselet 1902, p. 397. 



RousSELET (1902, p, 397.) only says: "The male has been seen seveial limes, and has 

 much analofiy with S. ohionga." 



Synchæta gyrina Hood. 

 Male: Hood 1887, p. 149. 

 Hood (1887, p. 149) only says: "The male is a conical slender creaUirc, 85/(." 



Synchæta tavina Hood. 



Male: Rousselet 1902, p. 397. 

 RoussELET (1902, p. 397) gives no drawing. It is only stated that the brain is long witli 

 opaque granules at the tip of which red granules forming a double eye are imbedded. 



Synchæta neapolitana Rouss. 



Male: Rousselet 1902, p. 410. 

 Rousselet (1902 p. 410, Tab. V, fig. 9b, c) has found the male. He only states: "It is of 

 usual structure. Size of male 75, of female 109 — 163,«." 



Synchæta Cecilia Rouss. 



Male: Rousselet 1902, p. 407. 

 Rousselet (1902, p. 407, Tab. VII, fig. 16 b). The male of this species seems to be disting- 

 uishable owing to the large dorsal antenna, which is seen to emerge just above the red eye, 

 and which is slanting baclvwards. Further the lateral antennæ are also conspicuous by their 

 size, protruding low down at the sides of the body. Size of male 78^, of female 142,«. 



Synchæta vorax Rouss. 



Male : Rousselet 1902, p. 408. 

 Lie Petersen 1905, p. 20. 



Rousselet (1902, p. 408, PI. VIII, fig. 19 a) describes the male as follows: ''The median 

 tubular antenna, which is so prominent and characteristic in the female, is also present but 

 of small size; in addition to this, the male has on the front two small tubular antennæ, one 

 on each side, which is very strange. Further it has at the extreme front of the head but 

 slightly ventral in position two stout fleshy, freely movable processes, surmounted by a broad 

 brush of long stiff hairs. In no other males have I seen such organs." Size of male 149,", of 

 female 272 ,u. 



Lie Petersen (1905, p. 20, Tab. I, fig. 5) gives a very good figure of the male, but no 

 description. It seems that he has interpreted the alimentary canal correctly. 



It will be seen that the males of the genus Synchæta are found rather fre- 

 quently. Especially Rousselet lias described and figured the males of several 

 species, but as far as I can see all these males are not described in such a way, 

 that they may be distinguished from each other; most probably the majority of them 

 are really indistinguishable. Still it seems that there are two species 6'. cecilia and 

 S. uorax which are characteristic. 



