192 PACHYTERIA AFFINIS. 



In the female the 5^^ abdominal segment shows a bro- 

 ken impressed pro-apical line, preceded by a semilunar im- 

 pression , whereas its apical margin is notched in the middle. 



In the male the S^b and Q^^ abdominal segments are 

 broadly emarginate , the 6th more deeply than the St^. 



N. B. The form of the apical segments of the abdo- 

 men of Pachyteria afjinis Rits. in both sexes is almost 

 exactly the same as in P. rujicollis Waterh. (== coUaris 

 Har.) and P. javana Bates (= puncticoUis Rits.) , and most 

 probably also in P. equestris Newm. ; of the latter , how- 

 ever , I have only seen the male sex. These four species are 

 also in other respects nearly allied to one another. 



Another group of species, in regard to the shape of the 

 apical ventral segments, contains Pachyteria basalis Waterh. 

 (= polychroma Har.), P. riLgosicollis Rits. and P. Hageni 

 Rits., most probably also P. speciosa Pasc, a species 

 which I have not yet seen. In the female of these species 

 the 5th ventral segment is notched on each side behind: 

 in the male the 5th segment is broadly emarginate , the 

 6th segment very deeply emarginate , the sides of the emar- 

 gination parallel. 



Notes from the Leyden IMuseum, Vol. JC. 



