668 



STATE BOARD OF AGRICULTURE. 



brown. Derm thickly dotted with pores appearing as oval, pellucid 

 areas each enclosing a dark dot. Immediately in front of the anal- 

 plates is an area marked with many round gland-pores forming a large 

 cluster w^hich is ill-defined, the round pores thinning out and occurring 

 scattered among the more plentiful ordinary type of pores which occur 

 all over the body. 



Antennae five or six-jointed, short, conical and of vestigial type. Legs 

 also short and thick. 



Spiracular setae not observed, but described by Dr. Thro as short, 

 stout, and in groups of three, sub-equal in length and about one-half 

 as broad as long with the median seta notched at apex. Marginal setae 

 short and conical. 



Anal-plates with cei)halo-lateral margin longer than caudo-lateral ; 

 angles rounded, each plate bearing one fringe seta ; five or six sub-apical 

 setae and three apical setae, the latter placed on the dorsal surface. 

 Sometimes there is also an added apical seta on the ventral surface and 

 sometimes there are only two dorsal apical setae. The sub-apical setae 

 vary somewhat in position. There are present a number of hyj)opygial 

 setae which are not represented in our figure because of distortion in 

 the specimens available. Anal-ring has ten spines. 



The specimens studied came from Orwell, Ohio, having been collected 

 by the late Professor E. E. Bogue from cucumber-tree. 



LECANiuM (Toumcyclla) liriodendri Gmel. 



First reported on tulip-tree from Michigan by Dr. Cook in 1878 

 material from which our drawings were made came from Connc 

 in 1890 and was determined by Dr. Cook as Lee. tullpiferae. 



Figure 5. 

 Lccanium liriodendri. — 1, leg; b, antenna; sp, 

 spiracular sotae ; and ventral view of anal- 

 plates ; f, fringe setae; sa, sub-apical setae; 

 a, apical setae, the last named on dorsal 

 surface. 



♦Can. Ent. Vol. X, p. 192, (1878). 



