436 MAINE AGRICUIvTURAI, EXPf^RIMENT STATION, IC)I2. 



localities from which it has been record'cd and the limited num- 

 ber of observations made upon this species in Maine nothing 

 can be said in regard to the number of generations occurring 

 during a single season. This insect occurs upon a large number 

 of trees and shrubs in nearly every state in the Union. Speci- 

 mens have been seen by the Entomologists of this Station from 

 Limerick, West Baldwin, Wells, and Millvale. 



Remedies. Spraying with lime-sulphur late in the winter or 

 early in the spring before the appearance of the leaves will con- 

 trol the iDest, provided the work be thoroughly done. Oil 

 emulsions when applied by experienced men are also effective. 



Aulacasfis rosae. 



THE ROSE SCALE. 



Bouche, Naturg. Ins. p. 14, 1834. 



Herrick Tech. Bui. No. 2, Miss. Agr. Expt. Sta., 191 1. 



"Scale of female. White, often with a yellowish tinge and circular 

 or irregular when crowded. The light yellow exviviae are to one side 

 of the center, in fact, quite near the edge. Diameter, 2 mm. to 3 mm. 



"Scale of male. It is long, white, and tricarinated. Length 1.25 mm. 

 to 1.4 mm. 



"Female. The bodj^ is long with the anterior end, consisting of head 

 and thorax, large and wide. The abdomen is plainly segmented with 

 the ends of the segments projecting and those of the two preceding the 

 last bearing 8 to 10 gland spines. There are three pairs of lobes. The 

 median lobes are large, approximate at base but diverge laterally. They 

 are. attached to the pygidium the whole length of their lateral margins 

 and are serrate on the inner margins. The second and third lobes are 

 lobulated, the inner lobule always the larger. Beyond the third lobes 

 is a double. lobe-like projection marking the projection of the second 

 pair of projecting pores. There are three pairs of conspicuous project- 

 ing pores with a single one between the median and second pairs of 

 lobes. The plates are long and stout and situated as follows : one on 

 the lateral base of each of the three pairs of lobes, one beyond the third 

 pair of pores, and two usually, sometimes more, beyond the third pair 

 of pores. There is a small seta on the median, second, and third lobes, 

 and one just beyond the second and third pairs of pores. The dorsal 

 pores are in three rows. The circumgenital pores were as follows in 

 eight specimens : 



15 18 12 8 16 15 17 ' 14 



24 — 24 21 — 23 23 — ? 31 — 28 27 — 26 25 — 24 24 — 27 22 — 24 



20 — 19 24 — 20 2y — 22 25 — 26 21 — 22 23 — 25 26 — 29 21 — 22 



"The lateral groups are often practically continuous." (Herrick 1911). 



