MORPHOLOGICAL NOTES. 



35 



more or less ovate except in Stebbi n gel la (fig. 60), where it has a 

 trapezoid form. 



The (jenu is always short and not dilated. 



The tibia is tolerably long, except in the first two pairs of peneo- 

 poda; in the third and fourth pairs in Glossocephalus, and in the third 

 and three following in Xiphocephalus it is much elongated. In the 

 female of this last genus it is sometimes, and I think periodically, enor- 

 mously inflated owing to the strong development of the glands within it. 

 In the former genus it is much dilated, resembling that joint in Phor- 

 corhaplns and Lycceopsis. The tibia is often provided with hairs or 



Fit,. 60. StclUngella Theeli. Fig. 61. TuUbergclln cuspidata. Fig. 62. Streetsia carinata. 



spines along the hind margin - - in the third and and fourth pairs - 

 or on the front margin - - in the fifth and sixth. 



The carpus. The development of the carpus 

 in the first and second pairs has been spoken of above 

 ( p< 31 33). I n the third and fourth pairs the carpus 

 is never dilated, as it is for instance in the genera 

 Parathemisto and Euthemisto; it is often spiniferous or 

 serrated, and in Xiphocephalus sometimes inflated, 

 but not in the same degree as the tibia. In Glosso- Jv- 63 - . 



,, ,.-, mi Xiphocephalus Whitei. 



cephalus it is dilated as well as the tibia. 



carpus of the fifth and sixth pairs is usually serrated or set with spines; 



in Xiphocephalus it carries a series of ovate discs or plates armed 





