HARDWICKE'S SCIENCE-GOSSIP. 



149 



across the base of the abdomen, the body of the 

 insect is dark, but is clothed with silver-grey hair, 

 which glistens in the sunlight. 



The wings are very dark in colour ; the parts 

 shaded in fig. 92 are deep brown, and those not 

 shaded are colourless and transparent. The an- 

 tennae have seven joints, the same number as those 

 of the Tabani, but one more than those of the 

 Hamatqpoia: they are very long, and are carried 

 horizontally. A drawing of an antenna is given at 

 c, fig. 93. 



Fig. 95. Foot of H&malopota, X 20 diams. 



Fig. 92 represents a female Chrysops cacutiens. 

 The male has darker wings than the female, and its 

 eyes are less brilliant, there being but few purple 

 patches on the green ground-colour. The mouths 

 of these three genera of Tabanidce are all much 



Fig. 96. Mouth of Female Chrysops x 28 diams. ; seen from 

 above, the Labium, la, being iully extended and partially 

 expanded. Ibr, Upper Lip, Labrum ; /, Tongue, Lingua; 

 la, Lower Lip, Labium ; md, Mandibles ; vix, Maxilla; ; nip, 

 Maxillary Palpi. The dotted line at the base of the drawing 

 indicates that a piece of the epistoma covers the bases of all 

 the organs, as shown in the figure. 



alike in principle, although they differ of course in 

 various particulars ; for instance, the one here se- 

 lected for description is longer than either of the 

 others. 



Eig. 96 represents the mouth of a female C. 

 cacutiens. In order to display all its orgaus per- 

 fectly, the specimen was subjected to a slight pres- 

 sure. It is, therefore, somewhat distorted, for when 

 the mouth .is at rest the lower organs are partially 

 or wholly concealed beneath the upper. The first 

 object which presents itself is the upper lip or 



Fig. 97, x 160 diams. L, Tip of the Tongue j Ibr, Tip cf 

 the Upper Lip, showing the curious rasps in which it 

 terminates. 



m 



(J 



m x 



Fig. 93, x 165 diams. ; md, left-hand Mandible, showing 

 at s its serrated tip ; mx, left-hand Maxilla, showing its 

 fringe of hairs and sharp teeth. 



labrum, Ibr. This is a straight, stiff lancet ; its 

 articulation at the base is particularly strong, and 

 it ends somewhat abruptly, in what look like two 

 little rasps (see Ibr, fig. 97). Below the labrum are 



