REPORT OF THE CRANBERRY SUBSTATION. 129 



On June 2, 1918, an infested area was spraj^ed with Black-Leaf 40, 1 

 part to 800 parts of water, soap being added as in 1917. The njonphs 

 were small and the treatment was verj^ effective, practically all the spittle 

 masses disappearing, while they remained abundant on the untreated 

 surrounding parts of the bog. 



In 1918 the writer reared adults of this species from the following: — 



1. Gaylussacia frondosa, Torr. & Gray. 



2. Gaylussacia resinosa, Torr. & Gray. 



3. Vaccinium tacillans, Solander. 



4. Vaccinium corymbosuvi , L. 



5. Vaccinium macrocarpon. Ait. 



6. Andromeda ligustrina, Muhl. 



7. Leucothoe raceniosa, Gray. 



8. Cassandra calyculatn, Don. 



The insect infested all these species except V. corymhostmi very abim- 

 dantly. As some of these plants grow in great abundance around or near 

 most Cape bogs, they furnish a large source of infestation for them. As 

 the insect does not infest refiowed bogs, however, its progress from the 

 uplands onto the bogs must be very slow. 



Clastoptera proteus, Fitch, has been defined to include a variety of 

 forms.' The writer thinks that the forms (subspecies y?am and subspecies 

 nigra, var. o, of Ball) which Professor Osborn bred from dogwood ^ really 

 belong to species distinct from the one (subspecies vittata and subspecies 

 nigra, var. 6, of Ball) infesting the cranberry and other plants of the 

 heath family. The writer has seen some of Professor Osborn's specimens. 

 Of these, one female and one male belonged to Ball's subspecies flava, 

 and two males to subspecies nigra, var. a. The writer has reared hun- 

 dreds of specimens of both sexes from ericaceous plants. Nearly all his 

 females belong to subspecies vittata. A few of his females and all his 

 males belong to subspecies nigra, var. b. He has captured specimens of 

 vittata and nigra, var. b, in coition. The pronotum of vittata and of nigra, 

 var. b, always has a slight median longitudinal sulcus. None of Osborn's 

 spechnens were at all sulcate longitudinally on the middle of the pro- 

 notum, the two males of nigra, var. a, even being sUghtly carinate longi- 

 tudinally there instead. Further structural differences should be looked 

 for in the male genitalia. 



The Cranberry Tip Wonn {Dasyneura vaccinii Smith). 

 The Proctotrj^pid, heretofore reported ^ as the most important parasite 

 of this species, has been identified^ as Ceraphron pallidiventris Ashm. It 

 was bred from the maggots in great numbers in 1917 as it had been in 

 1916. 



' Ball, E. D.: Proc. Iowa Acad. Sci., III., 1895, pp. 186, 187. 



2 Bul. No. 254, Maine Agr. Expt. Sta., 1916, p. 284. 



3 Bul. No. 180, Mass. Agr. Expt. Sta., 1917, p. 226. 



* By Mr. A. B. Gahan of the Bureau of Entomology. 



