248 DAVENPORT ACADEMY OF SCIENCES. 



with five or six scalloped or>caly annulations ; joint 3 variable, 

 even in the same specimen. In some specimens that portion 

 between the anterior and posterior sensoria is almost one-half 

 longer than usual, ys^hile in others a smaller but very distinct 

 projecting intermediate sensorium may be observed just below the 

 anterior sensorium. Wings large, distinctly dusky or brownish ; 

 veins and stigma darker ; all veins bordered with a dusky shade. 

 Stigmal vein straight, connecting with the stigma near its base. 

 Found at Georgiana, Fla., on Hickory (species not deter- 

 mined) . The migratory females leave the galls from about the 

 middle to the end of March. 



Phyi^IvOXERa devastatrix Pergande, n. sp, 



PI. XVII., figs. 131-135- 



The galls of this species resemble very closely the smaller galls 

 of carymcaulis and also those of perniciosa. From both of these, 

 however, the species differs markedly in the antennae of the 

 winged form, which are much more slender than in either of the 

 other two, with scarcely a constriction above the lower sensorium 

 and with the anterior sensorium much shorter. 



Its principal points of attack, as in the other species of this 

 group, are the tender twigs, petioles and the midrib of the young 

 leaves ; but the leaf -buds and flower-buds are also often involved 

 so as to prevent the setting of the fruit. 



It appears to be an exclusively western or southwestern species, 

 infesting the Pecan-hickory {^Hicoria olivcsformis) during May and 

 early June. This gall was first received in 1887 from Mr. M. E. 

 Winster of Staunton, Adams County, Miss., and again in 1889 

 from Mr. H. M. Johnson of Marston, I^a., with the statement that 

 it was greatly damaging the trees. It is either globular or more 

 or less irregular in shape, especially where much crowded. Be- 

 fore opening it is often provided with a short more or less distinct 

 nipple, most prominent in the younger galls, and becoming almost 

 obsolete in the more mature form, when its position is indicated 

 by a more or less densely pubescent spot. It splits transversely 

 into four or more broad bracts, similar to those of carycBcaulis. 

 The size varies frem 3-15™"-. Surface smooth, green or yellow- 



