MORPHOLOGICAL NOTES. 



29 



phalidae and the cutting edge is not at all separated from the stem by 

 a distinct neck. A molar tubercle is wanting in all the representatives 

 of the two families. The palp is strongly developed in the males; among 

 the Oxycephalidae the first joint is more or less elongated according 



Fig 37. Oxycephalus 

 piscator. 



Fig. 38. Streetsia Steenstrupi. 



to the varying length of the head, and always nearly as long as the first 

 joint of the second pair of antennae; the last two joints are short, 

 subequal in length, and slender. I the Xiphocephalidae the first joint 

 is enormously elongated, being many times longer than the two termi- 

 nal joints together. 



Fig. 39. Dorycephalus Lindstroemi. 



Fig. 40. Tullbergella 

 cuspidata. 



The labium (fig. 40) is soft, the lateral parts being rounded. Both 

 the pairs of maxillae are very rudimentary being possibly represented 

 by two minute soft laminae at the base of the mandibles. 



Fig. 41. Fig. 42. 



Oxycephalus piscator. 



Fig. 43. Glossoce- 

 phalus spiniger. 



Fig. 44. Doryceplia- Fig. 45. Xiphoce- 

 lits Lindstroemi. phalus Whitei. 



The maxillipeds (fig. 41 45) consist of a two-jointed, much bent 

 stem; at the distal or lower margin of the second joint rise laterally two 

 more or less spoon-shaped laminae, the homolpgues of the palps in the Gam- 

 marids. In the middle between these laminae there extends a small, some- 

 times tongue-like process, sometimes more or less cylindrical or tube- 



