107 



posterior side of the head ; the space occupied by the ocelli very black ; the- 

 oeelli veiy prominent, reddish-brown. The front of the epistome black with 

 pale reddish sides ; the antennae pale reddish -yellow, like the front of the 

 head, the bristles brown, and slightly downy. In the middle of the face, 

 immediately below the insertion of the antennae, is a sort of horn or mem- 

 braneous plate, smaller than the surface, compressed between the eyes, almost 

 square in form, turned up at the anterior edge, and of a pale reddish-yellow 

 colour. The exposed part of the palpi is pale red, and the horn blackish- 

 brown. The thorax is of a uniform shining black, but ought to have had 

 blotches or grey lines, for one still perceives some traces of grey hairs on the 

 less exposed parts. The scutellum very large, globular, and rounded like the 

 other species of Ceratitis, but without blotches; the sides of the dorsal 

 surface shining black, and show, by the remains of fine hairs, that they have, 

 perhaps, been thus clothed when the insect was fresh. The wings hyaline, 

 with blackish nervures ; those at the base are widened, with their spaces 

 marked with blotches and little black lines as one sees only in the Geratitis ; 

 beyond the spotted area and little before the middle, there is a large trans- 

 verse band of blackish-brown, bent at the side, and carrying a second oblique 

 band, which just reaches the lower margin, between the first band and the 

 summit of the wing ; there is, further at extreme tip of the wing, a 

 brown band which parts from two-thirds the length of the wing and along 

 the upper edge to the extremity. The abdomen is triangular, of a bluish- 

 black tint, with transverse bands of soft grey hairs. Legs brown, with the 

 knees and the first two or three joints of the tardi yellow ; the hind legs 

 thick at the base, without spines on the inside of the external extremity, with 

 two large tubercules or rounded teeth. 



This specimen of the male sex is 6J millimetres in length. It has been 

 given to us as coming from Port Jackson, New Holland (now Sydney, New 

 .South Wales). 



The Mauritius Fruit Fly. 

 Ceratitis cafoirei, Guerin. 

 (Rev. Zool., 1843, p. 197.) 



In a paper entitled a " Monograph d'un Gene de Muscides nomme Ceratitis" 

 Guerin describes all the known species of the genus at that date, and adds 

 several new species, among which is this species. The following is a trans- 

 lation of Guerin's description : 



" Head antennae and face of a pale yellow colour, the horn (spatulate tipped 

 bristle ?) of the male inserted at the anterior extremity of a little oblong 

 tubercle near the eyes, a little longer than the head, and terminating into a, 

 spatulate process of a triangular shape, or truncate at the tip. Thorax black, 

 shining on the dorsal surface, with fine white-grey transverse ridges above 

 on the front edge, formed of a very fine close pubescence broken into the 

 middle, with two large black spots, showing on the other hand near the hind 

 margin a transverse line and trident-shaped mark of golden yellow. Scutellum 

 shining black, globular, ornamented near the base with a line like the pre- 

 ceding one, but much deeper and sinuous ; posterior edge of the metathorax 

 below the scutellum covered with lines of fine white silvery pubescence. 

 Wings hyaline, with a slight touch of yellow on the nervures, the points 

 black at the base ; a large transverse yellow band edged with blackish, side by 

 side, and stained with black spots from the middle to the tip, and from the 

 side of the inner edge a brown band goes obliquely towards the side, and then 



