>0 THE CANADIAN ENTOMOLOGIST. 



and strongly curved. Antennae of all, very long and slender, reaching 

 considerably beyond the end of the body ; joint six with its spur is much 

 longer than the third, joints four and five are subequal in length, and 

 each of them somewhat longer than the third ; there are numerous sen- 

 sorial tubercles on joint three and a few on joint four, while all of them 

 are sharply serrate. The first joint is very much the stoutest, and bulging 

 out strongly about the middle at the inner side ; frontal tubercles promi- 

 nent and gibbous at the inner apical angle. Legs long and slender. 

 Nectaries clavate, reaching to the tip of the abdomen. Tail short and 

 inconspicuous. Length of winged and apterous females about 1.6 mm. 

 expanse of wings about 5 mm. 



Type No. 4,467, U. S. National Museum. Many specimens. Type 

 locality, Washington, D. C. 



This is a singularly handsome species, which in the peculiarly short 

 and strongly curved stigmal vein and strongly shaded venation reminds 

 one of Callipterus; while the gibbous frontal tubercles recall those of 

 some species of Myzus. There is also a queer tendency of losing one or 

 both branches of the third discoidal vein, the stigmal and sometimes one 

 or both of the veins of the hind wings. In one of the wings of one 

 specimen the second and third discoidals arise from the same spot, while 

 these two veins of the other wing arise from a common petiole. 



These plant-lice are very numerous at the crown of violet plants, pre- 

 venting the young leaves from unfolding or checking their development. 

 Many are also found in the petioles and on the under side of the leaves. 



ON TWO GENERA OF MLFES. 



BY NATHAN BANKS, EAST END, VA. 



In 1871, Thorell published his description of Rhagidia in a paper 

 entitled, " Om Arachnider fran Spetsbergen och Beeren-Eiland." He 

 placed it in the family Eupodidce, from the other genera of which it 

 differed principally in the great size of the mandibles. In 1876, Cam- 

 bridge, in his paper " On a new Order and some nevv Genera of Arach- 

 nida from Kerguelen's Land," described Pxcilophysis as the type of a 

 new family and a new order. He was unaware of Thorell's mite, yet 

 there is but one prominent difference between them, Poecilophysis is said 

 to have eyes on the frontal tubercle. Neither of these authors gave any 

 reference to any species of Koch's genus Scyphius, to which their forms 

 bear a great resemblance. Koch described about a dozen species of this 



