56 Description of a new Strepsipterous Insect. 



whose distinction is in some places very obscure, at the sides 

 tolerably strongly marked : the last segment is excavated, with 

 two segments of an anal apparatus protruding, but not capable of 

 greater exsertion than is represented in the drawing. 



Not being able in this place (Colombo in Ceylon) to determine 

 whether the Sphex in which the Xenos was detected be previously 

 described or not, I subjoin the following short description and 

 provisional specific name. 



Sphex aurocapillus. 



Body black, covered with golden hair, especially at the margins 

 of the thoracic plates and of the forehead ; antennae black ; wings 

 pale brown ; the posterior margin of each wing with a broad 

 dark band ; legs ferruginous ; abdomen rufous, with the apex 

 darkish. 



At Rio Janeiro, the fourth segment distorted by the insertion 

 of the pupa of Xenos Westwoodn. 



Plate IV. fig. A. Xenos Westwoodii. 



B. Portion of the head and anterior segments of the thorax be- 



neath. 



C. Antenna. C t and C i'. Portions of ditto more highly magni- 



fied. 



D. Foreleg from above, v"' and i>'^ two of the tarsal joints. 



E. Sphex aurocapillus, and details. E 6. Spatulate hairs. 



