162 ENTOMOLOGICAL NEWS. [September, 



genus; dermis with moderately numerous double gland-orifices, not ex- 

 tremely small; the orifices frequently diverging from each other, so that 

 the two present a more or less crescentic outline. These double glands 

 are arranged regularly in rows, nearly so as to make diagonal as well as 

 longitudinal lines. The thicker parts of the skin are burnt sienna color, 

 and conspicuously lineolately marbled all over. At both ends of the 

 insect are many large, round, or suboval glands, showing a central spot. 

 There is a stout bristle on each edge of the posterior cleft, with one or 

 two small bristles a little laterad. 



II. BIOL-OGICHL. 



By A. L. QUAINTANCE, Fla. Agr. Exp. Station. 



On Nov. 1 8, 1896, Prof. P. H. Rolfs called my attention to 

 this coccid which he had discovered on a stick of hickory wood 

 among some recently delivered stove-wood. About one week 

 later I made a careful search for it in the neighborhood from 

 which the wood was supposed to have been taken. Fortunately, 

 the scale was found on the higher limbs of a large hickory tree 

 (Carya porcina Nutt) which had been blown down by the severe 

 storm of September 29. A careful search in the neighborhood 

 of this tree among those that had been blown down, and among 

 the smaller trees standing, failed to reveal the insect on any but 

 the one tree, and as some of the limbs from the infested portion 

 had been cut off it is quite probable that this was the tree from 

 which the infested wood had been cut. 



The scale is interesting, biographically, from the effect which 

 it seems to produce on the infested limbs. It would appear that 

 the scale causes a decided stunting of the tissue in its immediate 

 vicinity. These stunted areas were not observed, except as asso- 

 ciated with the scale. But not in every case was there a stunted 

 area associated with the scales; see fig. i. But in such cases the 

 limbs infested were comparatively large and the bark thick, and 

 the tissue beneath would not be so seriously affected as in the 

 smaller and thinner barked limbs. 



At this date, March 12, the young scales have just hatched. 

 These doubtless soon become fixed and pass their life on one 

 spot with the beak piercing the bark and extending into the tissue 

 beneath ; and this during the season that the tree is in most 

 growth. As a result, the area immediately around the scale be- 

 comes retarded in its growth, while the unaffected tissue a little 

 farther out keeps up its normal development, and the scale is 

 eventually in a pit. 



