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THE ENTOMOLOGIST. 



grey, clothed with yellow hairs, which are longest on the sides. 

 Abdomen dark brown, clothed with long wliitish hairs, which are 

 seated both on the middle and on the edges of the segments, but 

 are longer and thicker in the latter situation. The hinder 

 margins of the wings in freshly-hatched specimens (especially 

 among the females) are also marked with a pale line. The 

 organs at the extremity of the male abdomen are very com- 

 plicated, and though the variation of these parts is of great 

 importance in the determination of species ; they are very 

 difficult to describe without the aid of figures. I have, therefore, 

 / inserted a cut, taken from Dr. Riley's work, 

 the accuracy of which I have verified. They 

 consist of a pair of forceps or claspers 

 furnished with movable hooks, and of a 

 central style provided with several peculiar - 

 shaped processes at its base, which are thus 

 described and named by Dr. Riley : — " The 

 style (c) is a pointed process, reaching when 

 at rest not quite to half the length of the 

 swollen basal joint of the claspers, and 

 broadening basally ; a supra-penal piece (d) 

 is crescent-shaped, the ears of the crescent reaching about as far 

 as the tip of the style, and its base broadening ; still above this is a 

 V-shaped palpigerous piece (e) broad terminally, with a well- 

 marked V-shaped medial slit, and with a simple palpus and a stiff 

 hair on either side." The oviduct in the ? consists of three joints, 

 which when fully exserted are longer than the rest of the body 

 of the insect. The first joint is very short and black, and the 

 only one visible when the organ is retracted ; the second joint is 

 pale yellowish brown, and about two-thirds of the length of the 

 abdomen ; the third is about as long as the second, very thin- 

 pointed and very pale, so as to be almost invisible to the naked 

 eye. Halteres with yellowish stalks and clear white knobs. 

 Wings dusky, clothed and deeply fringed 

 on the hind margins with black hairs. The 

 second longitudinal or cubital vein runs 

 nearly straight until near the end, when it 

 curves downwards, and reaches the margin 

 a little behind the point of the wing. The third longitudinal 

 or anal vein runs in quite a straight direction to the point at 



Male organ of 

 DijAosis lyijrivora. 



