32 MASS. EXPERIMENT STATION BULLETIN 168. 



black, taking on the latter color only two or three days before they hatched. 

 The young caterpillars emerged on June 14 and were mostly black in color. 

 These worms full-grown were about 2| inches long and of a fairly uniform 

 chocolate-gray color. They went down to a maximum depth of 2 inches 

 in the sand of the breeding cans to pupate. The pupse were from 18 to 23 

 millimeters long and from 6 to 7 millimeters broad across the tips of the 

 wing cases. Their general color was light chocolate-brown, with an irreg- 

 ular sprinkling of fine black spots, the spiracles and their immediate sur- 

 roundings appearing as very noticeable black spots along their sides; but 

 the wing cases were uniform light brown. 



The adult moth measures, with wings spread, about 2 inches from wing 

 tip to wing tip, and is of a light gray color moderately variegated with 

 light brown, appearing as though it were lightly sprinkled over with pep- 

 per, with a straight white line running across the hind part of each fore 

 wing, and a noticeable, though small, black spot in front of the middle of 

 each wing. Though commonly seen on the bogs, the caterpillars of this 

 insect have never been found by the writer in sufficient numbers to do 

 any considerable injury. This is the fifth important species of cranberry- 

 attacking spanworm that has thus far been reared, the other four being: 

 Cymatophora sulphur ea (Packard), ^ the green spanworm commonly found 

 late in May eating holes in the winter buds at the tips of the uprights; 

 Epelis truncataria var. jaxonii Minot, discussed at length in the last two 

 annual reports of the substation; the " chain-dotted geometer " {Cingilia 

 catenaria Cram.), a bright yellow worm measuring about 1^ inches in 

 length when full grown, commonly seen on cranberry bogs in small num- 

 bers in late July and early August; and the "cranberry spanworm" {Cleora 

 pampinaria Gn.), fully discussed by Dr. John B. Smith in Farmers' Bul- 

 letin No. 178 of the United States Department of Agriculture. The writer, 

 in eight seasons of cranberry investigation, has never found a caterpillar 

 of the last-named species on any bog, and Prof. H. B. Scammell, after 

 three years' work in New Jersey, has yet to find it there. 



An Ichneumonid parasite, Amblyteles putus Cress. ,2 was reared from 

 Cymatophora sulphur ea in small numbers. 



What appears to be an infestation by the "cranberry rootworm" 

 {Rhabdopterus picipes (Oliv.)) was discovered in October on a bog in Ware- 

 ham, some two acres showing more or less injury. This insect has not, 

 heretofore, been known to be injurious on any Massachusetts bog, but 

 it is an old and rather serious offender in New Jersey. No beetles have 

 yet been reared in connection with the infestation found in Wareham, 

 but specimens of the grubs and injured vines were sent to Professor 

 Scammell, the entomologist investigating cranberry insects in New Jersey 

 for the Bureau of Entomology of the United States Department of Agri- 

 culture, for comparison, and he replied concerning them: "Have just 

 compared your larvae with some alcoholics of mine and must say that I 



> See Entomological News. Vol. XVIII, p. 17, 1907. 



' Determined by Dr. J. F. Martin, who recently finished his postgraduate course at the 

 Massachusetts Agricultural College, specializing with the Ichneumonidae. 



