Morphological Notks. 



25 



The followiug joints of the flagellum are three in number in all the spe- 

 cies of the family Oxycephalidae that I have examined, but vary 

 in length from one species to another (fig. 19 and 20). In the young 

 male the first flagellar joint is scarcely curved, but resembles that joint in 

 the female, and the second flagellar joint is not separated from the first 

 (fig. 21 and 22). In the Xiphocephalidae on the other hand the 



Fig. 18. Tullhergella cuspidata. S- Firj- 19. Oxycepfialus pectinatus. cf. 



number of these joints is not the same in the diff'erent species, there 

 being three flagellar joints following the first large one in Xiphocepha- 

 lus armatus, H. Milne Edwards, but only one in X. Whitei, Spence 



Fig. 20. 

 Streetsia Steenstrupi. iS- 



Fig 21. 

 Oxycephalus pecti- 

 natu.i. Young cJ. 



Fig. 22 

 Oxycephalus Clausi. 

 Yuung cf. 



Fig. 23 

 Tullhergella 

 cuspidata. Ç- 



Bate. The second flagellar joint is fixed subterminally to the under 

 margin of the first one; the second and following flagellar joints are 

 also provided with long, slender hairs (fig. 19 and 20). 



The first pair of antennse in the female are very different in appear- 

 ance to those in the male, and difl'er also in the number of joints. 

 The second joint of the peduncle is usually coalesced with the first, 



Nova Acta Reg. Soc. Sc. ups. Ser. IIL 4 



