EXPERIMENT STATION BULLETINS. 



673 



extendiug to the outer edge on each side, tlie spaces between being darker, 

 the dorsum being darker both in front and in the rear. The surface is 

 shiny, smooth and covered with a delicate, thin coat of wax. The winter 

 is passed in a nearly full-grown condition. In her excellent account of 

 the life-history of this scale. Miss Murtfelt speaks of the color as bright 

 sealing- Avax red with brown and black, at the time when just acquiring 

 full-size. These bright colors disappear as the scale dries with age. In 

 the spring the growth is completed and eggs are laid from which nymphs 

 attain nearly full growth by the following autumn, there being but one 

 annual generation. 



Specimens boiled in caustic soda show a rather clear denn with feeble 

 chitonization. 



Figure 9. 



Lecanitim nigrofasciatum. — Antenna ; spiracular 

 setae ; foot ; gland-pores and ventral view of 

 anal-plates ; sa, sub-apical setae ; a, apical 

 setae, the last named on dorsal surface. 



The antennae are slender, six-jointed, the third joint being much the 

 longest. From the anal-plates, there extends cephalad a row of round 

 gland-pores, two-thirds of the distance to the cephalic margin, and there 

 is also a group of smaller pores scattered about each group of spiracular 

 setae. The marginal setae are not numerous, they are small, slender 

 and sharply pointed. Spiracular setae in groups of three with the 

 middle one much the longest and with rounded ends. The anal-plates 

 have rounded angles, the cephalo-lateral margin being longer than the 

 caudo-lateral. There are present on each side two fringe setae, the 

 outer one being longer; two sub-apical setae, and three apical setae, 

 short and inconspicuous on the dorsal surface of each plate. 



Surrounding the anal-plates is a conspicuous, chitinized border, nar- 

 row and forming a frame around the plates. 



The species is common in Michigan on Peach, and Ked maple, it is 

 also found on Plum, Prunus simonii, Sugar maple, Acer pseudo-plat- 

 anus, Crataegus, Sycamore, Bromelia, Basswood, Benzoin and Birch. 

 85 



