156 



ENTOMOLOGICAL SOCIETY 



Mandibles black, with four teeth, the first and second large and fitting 

 together when they are closed ; the third smaller, and situated above the 

 other three; the fourth at right angles with the first, on the same level, 

 and pointing back. The teeth of the mandibles come together just above 

 the four larger teeth in each of the maxillae, thus forming, as it were, a 

 double set of mandibles. Body cylindrical, elongated, smooth, shining, 

 and transparent, showing distinctly the internal canal. Slightly thicker 

 in the middle than at each end. With twelve segments, sutures and stig 

 mata obscure. 



Pupa : Length i to 2 mm. ; white, changing to dark 

 before the imago emerges. Appears to have nine 

 abdominal segments, the eighth and ninth encasing 

 the genitalia. Abdominal segments pubescent above 

 and below. The legs are applied to the breast. An 

 tennae joined in front, bent around the eyes, and lying 

 between the legs and the wing-pads. As viewed from 

 the side, the base of the antenna projects in an obtuse 

 point. Two acute conical horns in front, each bear 

 ing a long bristle; also two similar horns without 

 bristles just in front of the prothoracic stigma; the 

 latter being small protuberances situated a little above 

 the base of the wing-pad. Seven abdominal stigmata 

 are distinctly seen on the side; as viewed from above, 

 those on the second to sixth seg 

 ments appear as brown, nipple- 

 shaped projections. The last 

 abdominal (or the genital segment) 



bears two triangular, flattened horns on each side 

 above, and two fleshy, short protuberances, like pro- 

 legs, beneath. 



The female pupa is distinguished from the male by 

 its large size and by the eyes only, since, remarkable 

 as it may seem, the wing-pads are quite as distinct on 

 the female pupa as on that of the male. The pupae 

 before me are sufficiently advanced to show the female 

 organs through the transparent pupa-skin. After the 

 pupa is a day or two old, the eyes are distinctly seen ; 

 those of the female being much smaller, rounded above 

 and truncated next to the mouth-parts, while the eyes 

 of the male pupa are larger and more ovate, the mar 

 gins converging next to the moujh-parts. 



FIG. 17. , 

 scabiei. Pupa, lat 

 eral view, enlarged 

 35 diameters. 



FIG. *&.Ej>idapus 

 scabiei. Pupa, dor- 



Described from a large series of live, alcoholic, and balsam 

 specimens, bred from tubers reared from specimens collected 



