MORPHOLOGICAL NOTES. 



25 



The following 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 







Fi<l. 18. Tullbergella cuspidata. cJ. Fig. 19. Oxyceplutlus pectinatm. <$. 



number of these joints is not the same in the different 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. 



Fig. 21. 



Oxycephalus pecti- 

 nalm. Young cf 



Fig. 22. 



Oxycephalus Clausi. 

 Young cf. 



Fig. 23. 

 TullbergelUi 

 cuspidata. 



BATE. The second flagellar joint is fixed subtermirially 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 antennae in the female are very different in appear- 

 ance to those in the male, and differ 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. III. 4 



