152 DIPTERA. 



In describing P. capito I had but a single female, which I cannot examine now, and for 

 this reason my statements about it will be less precise than those regarding B. pusio, 2 • 



Head large, considerably broader than the thorax. The breadth of the vertex in the male equal to at least 

 two thirds of the greatest horizontal diameter of the eye in P. capito and P. willistoni, to less than half 

 of that diameter in P. pusio. The vertex in the female is broader than in the male, in P. pusio 

 more than twice the breadth of the greatest horizontal diameter of the eye. The front, immediately 

 above the antennae, is three or four times as broad as the vertex in the male, the position of the eyes being 

 oblique ; in the female of P. pusio the breadth of the front is but little more than that of the vertex. 

 The front and face descend almost perpendicularly towards the oral margin, the antennas therefore are 

 inserted at a much lower level than the vertex. The lower part of the front, the face, the base of the 

 antennas, and the oral opening are entirely concealed from view by a dense, tuft-like, crop of hair, similar 

 to that of Anastcechus, and especially conspicuous in the male. 



Ocelli placed on a prominence of the vertex ; the lateral ones large, and at a distance from each other which, 

 in the male, is at least one half larger than the interval between each of them and the nearest orbit of 

 the eye ; in the female of P. capito the latter interval is a little larger than the distance between the 

 ocelli, in the same sex of P. pusio it is nearly twice as large. 



Antennae inserted at some distance from each other ; in P. capito the space between them is distinctly larger 

 than that of the ocelli, in P. pusio distinctly smaller; first joint subcylindrical, concealed in the facial tuft 

 of hair ; second joint short, not longer than broad ; third longer than the first two joints taken together, 

 slender, sublinear, except a short basal expansion followed by an attenuation ; a minute fourth joint at 

 the tip, bearing a microscopical bristle (this fourth joint is very small in P. pusio ; much larger in P. capito, 

 where a moderate lens shows that it is two-jointed). 



Eyes glabrous, almost elliptical, without excision on the posterior orbit ; in the male the difference in size 

 between the large facets of the upper half and the smaller ones is more distinct in P. pusio and P. willistoni 

 than in P. capito. 



Oral opening oval, comparatively small, its upper edge reaching but little above the lower corners of the eyes ; 

 face and cheeks broad. 



Proboscis porrected forwards, not tapering towards the tip; projecting but little beyond the antennas in 

 P. capito, somewhat more so in P. pusio and P. willistoni. 



Thorax of moderate size, not gibbose, nearly on a level with the head ; scutellum but little smaller than in 

 Bombylius. 



Abdomen a little longer than the thorax and scutellum together ; as broad as the thorax at the base ; gradually 

 tapering in the male, more semioval in the female ; the genitals, in both sexes, hidden under the last 

 segment. 



Legs comparatively shorter than in Bombylius ; ungues curved, the pulvilli distinct and long. 



Wings : first posterior cell closed, its terminal petiole as long as in an ordinary Bombylius ; second vein gently 

 arched before the cross- vein connecting it with the anterior branch of the third (but not so deeply as 

 in Lordotus), its curvature beyond the cross-vein stronger than in Lordotus, so that the expanded distal 

 end of the marginal cell is bulging out beyond the end of the first submarginal cell; three submarginal 

 cells ; the first of the two exterior submarginal cells almost crescent-shaped, in consequence of the cur- 

 vature of the veins forming it ; a email cross-vein about the middle of the discal cell, and hence the 

 first basal cell is longer than the second ; the bifurcation of the second and third veins taking place a 

 little before the middle of the distance between the origin of the prsefurca and the small cross-vein, these 

 two veins becoming at once distinctly divaricate (and not approximate and parallel for a considerable 

 distance, as in Bombylius and Systoechus) ; the rest of the venation as in Bombylius and Systcechus; 

 anal cell open, &c. 



Pantarbes, in Greek, means " full of fear." 



In the thickness of its beard, entirely concealing the outlines of the mouth, this genus 

 resembles Anastcechus, O. S. ; its closest allies, however, are the European genera Mulio 

 and Callostoma. It is easily distinguished from both these latter by the structure of the 

 antennae, the first joint of which is longer, and the third not incrassate on its proximal 



