108 Table of Contents. 



PAGE. 



NOTES ON VARIOUS INSECTS 163 



Thalessa lunator, the Lunated Long-sting 163 



Numerous examples of the insect observed on and about the trunk of a 

 dead elm, 163. The trunk perforated by many small, round holes, 163. 

 The holes frequented by a wood-wasp, Pemphredon concolor, 163. The 

 holes believed to have been made by the insect, 163. The Pemphredon 

 figured, 163. Nothing recorded of the habits of the Pemphredons, 163. 

 What is written of the two European species, 163. A Tremex columba 

 taken from the same trunk, 163. Abundance of the " long stings " in 

 August, as reported by boys, 163. Figure of Thalessa lunator with 

 structural details, and of its larva and pupa, Plate 2 Males apparently 

 awaiting the emergence of the females, 163. Females observed in ovi- 

 position, 164. Ovipositing to the depth of two inches in solid wood, 

 164. Difficulty with which the ovipositor could be withdrawn by hand; 

 the abdomen torn apart in the attempt, 164. How long a time the 

 Thalessas were observed, 164. An instance reported where a Thalessa 

 was seen to insert its eggs in a colony of exposed Datana caterpillars, 

 164. The statement questioned by Professor Riley, 164. An Anomalon 

 species observed by Professor Gillette to oviposit in Datana ministra, 

 under similar attendant circumstances, 164. Probability that memory 

 was at fault in referring to Thalessa, the oviposition observed : some other 

 large Ichneumon may have been mistaken for it, 164. Serious results 

 reported as resulting from a wound in the arm near the wrist by a 

 " long-sting," 164. Correction of an error made in the Fourth Report 

 on the Insects of New York in presenting a figure as Thalessa lunator 

 which was that of Rhyssa persuasoria, 165. How the two species 

 differ, 165. Tremex columba figured in its larval, pupal, and perfect 

 stages, 165. The parasitic association with it of T. lunator, 165. The 

 occurrence of Rhyssa persuasoria in Canada, 166. 



? Janus flaviventris, the Currant-stem Girdler 100 



Reference to the notice of the currant-stem girdler contained in the 

 Fourth Report on the Insects of New York, 166. Girdled currant 

 stems received from Mr. Rose, of South Byron, N. Y., 166. Injuries 

 from it reported by Mr. Rose, 166. Its operations observed at Ghent. 

 N. Y., 166. The eggs found in the punctured twigs, 166. The insect 

 reared from girdled twigs in Adrian, Mich. , 166. Identified in "Insect 

 Life" as Janus flaviventris, 167. The insect — a saw-fly — had been 

 observed by Dr. Fitch in rye-fields: its operations therein, 167. Descrip- 

 tion of the species, 167. Different references of Janus in classifica- 

 tion, 167. Girdled twigs received from Mr. Rose which had been 

 marked the preceding season, gave out one example of the insect. 168. 

 Some doubt of its being the Fitch flaviventris, 168. 



Nematus Erichsonii, the Larch Saw-fly 168 



Still operating in the Adirondacks, 168. Many larches apparently 

 killed by its attack observed near the Wilmington Notch, 168. Had 

 been observed some years provious in the bake Placid region, 168. 



