1924 ] Proceedings of the Cambridge Entomological Club 171 
Mr. C. W. Johnson had investigated the 17-year Cicada 
on Cape Cod and found it abundant along the shore between 
Falmouth and Hyannis and northward to Bourne and Sandwich. 
It was also reported near Plymouth and down the Cape between 
Wellfleet and Truro. Its first appearance was about June 1 and 
mating and egg-laying continued from June 25 to the last of 
July. Mr. Metcalf showed young Cicadas which hatched from 
oak twigs brought from Cape Cod. 
Mr. Johnson showed the mud nests of the wasp, Ancistro- 
cerus birenimacidatus and a letter from Mr. Zeissig who had raised 
the wasps and numerous parasites which were exhibited. 
Mr. Plath told about his summer’s work on bumblebees 
of which he had 62 colonies under observation including two 
species not before found. Some of the nests were destroyed by a 
skunk which was caught and kept for some time in confinement 
and its habits in relation to the bees studied. 
At the meeting of October 9 several members gave accounts 
of their summer work. Dr. Bequaert of the Department of 
Tropical Medicine of the Harvard Medical School spent part ot 
the summer at Columbus, Ohio to study the collection of Taba- 
nidifi of Prof. Hine. Field excursions were made in the neighbor- 
hood and a new Tabanus was found, allied to T. longus. A rare 
fossorial wasp. Rhino psis melanogyiatha and a cyrtid fly Acrocera 
subfasciata were found on the bark of trees. 
Mr. C. W. Johnson exhibited the tropical Thysania zenobia 
taken by J. D. Smith at Holbrook, Mass., September 9, the 
second one found in New England. 
Mr. Johnson showed a fly from Mt. Desert which is probably 
the European Spania nigra which has a very variable venation. 
Mr. J. H. Emerton gave an account of the summer collecting 
of spiders on the farm of Nathan Banks on Winthrop Pond in 
Holliston, Mass. Over 160 species were taken between April 
and October. 
Mr. Plath showed some old nests of bumblebees which 
contained large numbers of larvae of parasites. A nest had lately 
been found in the Arnold Arboretum four feet under ground 
