286 THE CANADIAN ENTOMOLOGIST. 



(b.) Leucopis (near belhda. Dr. Riley informs me). A small grey parasitic 



dipteron. 

 (c.) E?icyrtus, sp. (fide Dr Riley). Reddish-ochreous. 

 (d.) Tetrastichus, sp. (fide Dr. Riley) was also bred, but it is a secondary 

 parasite. The species is black with whitish legs and iridescent 

 wings. 



(i6.) Dactylopius solaiii, n. sp. — $ about 3 mm. long, sparsely 

 covered with mealy secretion, but without lateral or caudal mealy pro- 

 cesses. Colour pale yellowish. Antennae of the type normal in the 

 genus ; 8-jointed, joint 8 elongate, about as long as 6 + 7 ; 2 a little 

 shorter than 8, but longer than 3 ; 7 a little shorter than 3 ; 5 and 6 

 equal, a little shorter than 7 ; 4 shoitest; i large and broad, about as 

 long as 3 ; 8 with three whorls of hairs. Formula 82 (31) 7 (56) 4. 



In another specimen, joint 8 was distinctly longer than 6 + 7. In 

 this, also, joints 4, 5, 6 and 7 were about equal. 3 also may be subequal 

 with 2. 



Femur J^ longer than tibia ; tibia ^ longer than tarsus ; trochanter 

 with a long hair ; femur stout, with a row of five short but strong bristles 

 on its inner margin, and four (two pairs) on its outer or convex margin. 

 Tibia with five strong bristles on its outer margin, and five or six on its 

 inner margin. Tarsus with four bristles on its outer, and four on its inner 

 margin. Claw stout, slightly curved. Tarsal knobbed hairs slender, 

 with subobsolete knobs. 



Mentum apparently 2-jointed. Derm with scattered hairs and round 

 gland-orifices. Rostral loop very short. 



Caudal tubercles as usual in the genus, distinct and fairly large, but 

 not elongated, each bearing two hairs of the same size as those on the 

 anogenital ring. 



Anogenital ring with either the normal six hairs, or, in some examples, 

 four hairs of the normal size and two small. 



On tubers of potato (Solanum ijiberosum), at the College P'arm, Las 

 Cruces, New Mexico, discovered by Mr, H. H. Griffin. Most of the 

 specimens had been destroyed by parasites, when I received the material 

 at the end of August. 



Although we have as yet no definite information beyond that given 

 above, it can hardly be doubted that the species lives naturally on the 

 roots of native Solanaceaj, and has thence spread to the potato, which is 

 not cultivated, except by way of experiment, at Las Cruces. It is ex- 



