EXPERIMENT STATION BULLETINS. 



667 



other parts of the body iu Iresh living specimens are found flakes of 

 snow-white wax. 



On the ventral surface there is a patch of setae cephalad of anal- 

 plates, also there are numerous round gland-pores cephalad of setae 

 on derm in region of plates, in fact, these round pores obscure the char- 

 acters of the plates and suggest coins strewn over the surfaces to be 

 studied. 



The anal-plates are somewhat rounded at lateral angles and not 

 sharply pointed at caudal angles. Cephalo-lateral and caudo-lateral 

 margins slightly curved outward. Each plate is bordered by a chitinous 

 thickening down its mesal margin, which thickening is continued 

 around the apex, up the caudo-lateral border nearly to the lateral angle 

 where it curves slightly inward from the margin for a short distance. 

 There are on each side, one fringe seta, and four or five sub-apical setae 

 on the ventral surface, and from five to eight apical setae on dorsal 

 surface of each plate. There are also eight or more hypopygial setae, 

 four or more on each side. In some cases there are two fringe setae 

 on each side. 



There are ten spines in the anal-ring. There is a chitiuized area 

 around the anal-plates; this area is variable in form in specimens col- 

 lected in November. 



Antennae three-jointed; vestigial in type. Spiracular setae not ob- 

 served; feet tin}', vestigial. 



LECANiuM (Neolecaniiim) cornuparvum Thro. 



Female large and elliptical, sometimes reaching nearly half an inch 

 in length. Specimens range from flat to elevated, depending on sur- 

 face of bark. Color sealbrown with varnished surface, marked with 

 oval maculations of lighter yellowish-brown. Surface dimpled, dusted 

 with waxy bloom. In caustic soda the liquor becomes rich mahogany- 



Figure 4. 



Lccanium cornuparvum. — Antenna; leg; 

 and ventral view of one anal-plate ; f, 

 fringe seta ; sa, sub-apical setae ; a, 

 apical setae, the last named on dorsal 

 surface. 



