331 



fringe of white hairs. Length '3 inch, breadth '175 inch. East 

 Indies. (Id. 47). 



26. PopilUa sticticollis. Testaceous, with 2 spots on the hinder 

 part of the head, 2 discoidal spots on the prothorax, as well as its an- 

 terior and posterior margins, the margin of the scutellum, the suture of 

 the elytra, as well as the lateral margin towards their apex, black. — 

 Length '45 inch, breadth "25 inch. Mexico. (Id. 48). 



27. PopilUa vidua. Black ; antennae testaceous, with the apex 

 black. Length -425 inch, breadth '25 inch. Mexico. (Id. 48). 



28. PopilUa semirufa. Ferruginous ; the apex of the antennae, 

 the crown of the head, the disk of the prothorax, the entire elytra, the 

 entire protibiae, the apices of the metatibiae and all the tarsi, black. 

 Length -425 inch, breadth -25 inch. Mexico. " The extreme similarity 

 in the sculpture of these insects leads me to suspect the invalidity of 

 the distinctions which I have derived from colour only." (Id. 49). 



29. PopilUa Castor. Castaneous ; the disk of the prothorax ru- 

 gose, its margins ochraceous : elytra sulcate, sulci deeply punctate, 

 the shoulders of the elytra black. Length '28 inch, breadth -175 

 inch. Mexico. (Id. 49). 



30. PopilUa Pollux. Nigro-aeneous ; the margins of the prothorax 

 and the entire elytra testaceous : legs brown, with the tarsi piceous : 

 elytra deeply puncto-sulcated. Length -27 inch, breadth '16 inch. 

 Mexico. (Id. 50). 



5. Description of a new Strepsipterous Insect. By Robert Templeton, Esq., R.A. 



This singular insect was found at Rio Janeiro in the abdomen of a 

 Sphex, which the author supposes to be new, and has named — 



Sphex aurocapillus. Body black, covered with golden hair, espe- 

 cially at the margins of the thoracic plates and of the forehead : an- 

 tennae black : wings pale brown, the posterior margin of each wing 

 with a broad dark band : legs ferruginous : abdomen rufous, with the 

 apex darkish. (Id. 56, tab. iv. E). 



The parasite, which the author has named Xenos Wesiwoodii, is 

 described at great length and with much care, not simply as a species, 

 but with a view of showing the true external anatomy of the genus 

 and even order of insects to which it belongs : it appears from the 

 description and figures that the parts which have occasioned so much 

 discussion find precise equivalents in the segments &c. of Coleoptera, 

 the so-called pseudelytra being analogous to the elytra, and so forth. 



Xenos Westwoodii. Antennae 4-jointed, the 1st and 2nd joints very- 

 short and somewhat cup-shaped, 3rd and 4th apparently equally short 



2d2 



