little-known species of Hymenoptera. 208 



middle spurs, a character which allies this species to 

 Megalodontes, but which I do not notice in any other 

 Derecyrta or Brachyxiphus. 



TENTHREDINID.E. 

 SELANDRIINiE. 



Cacosyndya. 



Pompholyx, Freym., Protocole d'Antr. Mosc, viii., 

 p. 217 (1870), nee Lea, 1852 (Mollusca). Type, 

 Pompholyx dimorpha, Freym. 



This genus is remarkable among the Tenthredinidce 

 for its having an apterous female, and I have therefore 

 given it a name alluding to the disparity of the sexes. 



EMPHYTIKdE. 



Aneugmenus Thwaitesii. 



Exp. al. 4 lin. ; long. corp. 2 lin. 



Black ; antennse 10-jointed, the joints well separated, 

 the 2nd, 4th, and 7tb of equal size, the 8th, 9th, and 

 10th gradually smaller and slenderer, the 3rd and 5th 

 twice as long as the 2nd, &c, and the 4th half as long 

 again as the 2nd. Head and abdomen punctured ; 

 thorax smooth and shining. Legs blackish brown, set 

 with short bristles; tarsi whitish yellow; claws brown. 

 Wings dusky hyaline, with piceous nervures, and covered 

 with short hairs. 



Ceylon ; collected by the late Dr. Thwaites. The de- 

 scription is somewhat incomplete, owing to the specimen 

 being carded. 



TRANS. ENT. SOC. 1883. PART II. (JUNE.) 



