294 [June, 



the colour of the pollen brushes on the posterior tibiae of the ? of 

 such Andrence as atriceps, niqrocenea, and Trimmer ana, as also of the 

 flocculus of the trochanter and the femoral hairs ; in the alteration of 

 the colour of the hairs of the face, and of the colour of the actual 

 tegument in such species where the clypeus and cheeks in the $ are 

 more or less white, as in labialis. Stylopized specimens of this species, 

 if $ , tend to have the white features of the face reduced in size and 

 altered in shape, and if ? , to have the ordinary brown face more or 

 less spotted with white ; there are also slight alterations in the re- 

 spective lengths of the antennal joints, in the size, &c, of the $ and ? 

 genital armature. 



Prof. Perez also discusses at length the internal effects produced 

 by the parasite. 



Towards the end of his paper he mentions that the majority of 

 the attacked specimens which he has examined bear only one Stylops ; 

 that of those which bear two, they are placed almost always between 

 the 4th and 5th segments ; once he has observed two under the 3rd, 

 and twice one under the 3rd and one under the 4th ; once again he 

 found two on one side under the 4th. Of specimens attached by 

 three Stylops he had only known two, one bore three under -the 4th, 

 placed symmetrically ; and one bore two under the 3rd and one under 

 the 4th, all on the left side. Of specimens bearing four he had never 

 seen an example, but mentions P. Smith having received a specimen 

 of A. victima from New Caledonia so affected. 



Among the Stylopized specimens I possess I find, like him, the 

 majority bearing one Stylops under the 4th segment. I have two 

 specimens bearing each two Stylops ; in both, these are placed one on 

 each side under the 4th. I have two specimens bearing three Stylops ; 

 in one there is one under the 3rd and two under the 4th, and in the 

 other all three are under the 4th — one exactly in the middle, and one, 

 as close to it as possible, on each side. I have two specimens also 

 with four Stylops ; one, a $ Trimmer ana, with two under the 3rd seg- 

 ment and two under the 4th, each about midway between the centre 

 and the lateral edge of the margin ; the other an atriceps $> , which I 

 caught at Hastings this year, which has one Stylops a little to the left 

 under the 3rd segment and three under the 4th, the middle one about 

 the centre of the margin and the others one on each side. 



Professor Perez has seen specimens with a Stylops under the 5th 

 segment, but I have never met with one myself ; it seems that under 

 the 4th Begment is the favourite locality, and then under the 3rd. 



