348 



Annals E?itomological Society of America [Vol. XIII, 



not in exceedingly abundant numbers. This stratum is char- 

 acterized by being somewhat lifeless and its insect inhabitants 

 small and inconspicuous. 



III. TREE STRATUM. 



Nearly all of the trees have their own particular kind of 

 galls. Galls caused by the Cynipids A?idricus virens, CalUrhytis 

 batatoides and Holcaspis Jicigera, (Fig. 17), are extremely 



Fig. 17. A, Galls on Querciis virginiana caused by CalUrhytis batatoides Ashm. 

 B, Galls on same host caused by Disholcaspis ficigera Ashm. 



abundant on the live oak, Querciis virginiana. The bases of the 

 needles of pine are often enlarged to form galls by the Cecido- 

 myid, Cecidoniyia brachynteroides. (Fig. IS). 



The scales, Chionaspis pinifolice var. keterophyllcB and 

 Lecanium parvicorne (?) are found at certain seasons in large 

 numbers on scattered individuals of the pine. These are 

 heavily parasitized by chalcids. From C. pinifolice var. hetero- 

 phyllce were reared large numbers of Aphelinus mytilaspidis and 

 ProspalteUa sp. and from L. parvicorne, Coccophagus immacidatus 

 and a species of Aphycus. The Florida wax scale, Ceroplastes 



