222 ENTOMOLOGICAL, NEWS [May, '14 



A new Coccid Infesting Citrus Trees in California 



(Hemip.). 



By ROY E. CAMPBELL, Berkeley, California. 



In the early part of 1909 student inspectors from Pomona 

 College discovered a soft scale on citrus trees near Claremont, 

 California, which appeared to be different from the common 

 Coccus hesperidum Linn. The insect was first identified as 

 Coccus longulus Doug., but was later changed to Coccus elon- 

 gatus Sign. Recent investigations by the writer indicate that 

 the scale is a new species. 



The insects were observed in no great numbers, but have 

 since become considerably more abundant, and have also been 

 found in a number of other localities. 



Coccus citricola n. sp. 



Adult Female. Length, 3 to 6 mm.; width, 2 to 3 mm.; general 

 color, dull gray, interspersed with numerous irregular yellowish spots. 

 Body elongate, ends broadly rounded. Dorsum with small blotches 

 forming a distinct irregular yellow stripe extending from anal plates 

 almost to anterior margin. Two similar less distinct submedian stripes 

 parallel with margin, and occasionally two indistinct submarginal 

 stripes. A yellowish band of the same character extends around the 

 margin. Antennae regularly eight-jointed, occasionally a specimen has 

 seven joints in one and eight in the other, rarely seven in both. Aver- 

 age and most common formula 8-3-1 (4-5) -2-6-7. The eighth is prac- 

 tically invariably the longest joint, sixth and seventh the shortest, 

 while the rest vary considerably. No hairs on third and fourth 

 joints. Stigmatic cleft small, with three spines, median spine curved 

 and three times as long as others. Marginal hairs numerous, simple, 

 pointed. Submarginal tubercles very few, or wanting. Anal ring 

 with six long pointed hairs, plates of the anal operculum with the 

 base slightly longer than the outer edge. Four fringe setae in 

 groups of two across anal plates, with the lateral setae of each group 

 longer than the mesal. Three subapical and four apical setae on 

 each plate. Tibia one-third shorter than femur and very slightly long- 

 er than tarsus. 



Adult Mafc.-^Length, i mm.; body width, .28 mm.; style, .25 mm.; 

 antennae, .57 mm.; wing length, .17 mm.; wing width, .05 mm. Color, 

 dark honey yellow, head and thorax slightly darker. Anterior pair 

 of upper eyes brownish, small. Posterior pair of upper eyes dark 

 brown and much larger than anterior pair. Ventral pair dark brown, 



