294 



MR. B. F. CUMMINGS ON LICE 



tlie sternal area of the 6th segment. Inimedinte]y in front of 

 the base of the appendage, which is hinged on to the 8th 

 sternite, the 7th shows a noticeable quadrilateral development 

 of its middle part which carries two bristles. The long, narrow, 

 finger-shaped appendage is attached in the mid-line of the 8th 

 and extends to the end of the abdomen, where it curves up 

 betAveen the two terminal stylets, which are excavated somewhat 

 on their inner surfaces to allow the appendage to pass and fto 



Text-fieure 24. 



Goniodes stylifer, $ . Terminal segments of the abdomen. Ventral view. X 58. 

 A. Appendage; Bt. terminal stylet ; Yll., T'JJJ. segments. 



project on the dorsal surface. This appendage on its dorsal 

 surface is concave, convex below. The doisal channel is formed 

 by the bending over of the free lateral margins, which meet in 

 the middle but can be separated by a needle and bent back and 

 flattened ortt as a plate. At its base the chitin is pinched up 

 to form a hinge. On each side of the middle line the sternite 

 is developed into a triangiilar piece, with the apex pointing 

 inwards. The 9th and 10th sternites apparently not developed. 



