THE CANADIAN ENTOMOLOGIST. 101 



A NEW PLANT-LOUSE INJURING STRAWBERRY PLANTS 



IN ARIZONA. 



BY T. D. A. COCKERELL, EAST LAS VEGAS. N. M. 



Myzus fragcefolii, n. sp. 



" Apterous female and larvae white or faintly yellowish. Eyes dark 

 brown. Antennae concolorous with body or faintly brownish ; apex of 

 the fifth, the sixth and its spur pale dusky. Tarsi dusky, their apex black. 



" Winged female : slightly more yellow, the head, thoracic lobes and 

 sternal plate blackish brown. Antennae black ; the two basal joints of 

 colour of body, or with a faintly dusky tinge. Legs pale dusky ; the 

 terminal third or half of the femora pale dusky ; apex of tibiae and the 

 tarsi black. The abdomen is marked with a small, squarish, dusky spot 

 in front of nectaries. Stigma pale dusky, veins black." (Theo. Per- 

 gande MS.). 



Apterous $ 1200 /x long; cornicles 400 /x. Rostrum reaching to 

 insertion of hind legs. Back with capitate hairs (about 65 /x long) on all 

 .the segments ; there are also two capitate hairs on the front, between the 

 frontal tubercles ; two at apex of each frontal tubercle ; three on gibbosity 

 of first antennal joint, one of them short ; one on second antennal joint ; 

 one short one about 39 /x from base of third antennal joint. Antennae 

 6-jointed, joints measuring as follows in /x : (r.) 90, (2.) 50, (3.) 300, (4.) 

 200, (5.) 220, (6.) 505, with the basal part, to the notch, 90. Hind legs : 

 femur, 360 ; tibia, 630 : tarsus (excl. claw), 84 /x. 



Winged $ 1200// long; hind tibia 800 /x ; antennae about 1500 /x ; 

 eyes prominent, large. Frontal tubercles slightly gibbous anteriorly, the 

 gibbosity about 15 \>. high; first antennal joint gibbous in front, the 

 gibbosity rounded and very blunt. 



Hab. — Jerome, Arizona, on leaves of strawberry, very abundant, not 

 producing any deformation. Collected Dec. 10, 1900, by Mr. E. L. 

 Jordan, who reported the insect as very destructive the year previous ; 

 " they get in the buds and blossoms and destroy the young fruit, and the 

 berry is imperfect when ripe." 



M. fragcefolii is noticeable for the abundant development of the 

 capitate hairs in the apterous form, whereby it is allied to M. ribis and M. 

 clceagni. I am greatly indebted to Mr. Theo. Pergande for the informa- 

 tion that it is surely undescribed, and for a description of its colours in 

 life, which I have quoted above. While I have prepared this article in 

 deference to Mr. Pergande's wish, it will be apparent to the reader that 

 the credit for the discrimination of the species is really his. 



