1919 ENTOMOLOGICAL SOCIETY. 17 



Although these butterllies, during the last two seasons, gave ample oppor- 

 tunity, in this locality, of observing their congregating haljits, 1 was not fortunate 

 enough this fall to see a single flock. 



I wish also to report the securing of the producers from a gall on Bur Oak, 

 Quevcus macrocarpa. These producers have been kindly identified by ^Ir. Win. 

 Beutenmuller as Neuroterus flavipes Oill. 



The gall, which is polythalamous, is an elongated, irregular swelling from 

 the midrib of the leaf, but also extending out slightly along the veins. It is 

 somewhat triangular in cross section. Opening on the upper surface of the leaf, 

 from which the gall chiefly projects, are minute canals, one passing to each 

 larval chamber. 



Length of gall parallel to the axis of the midrib 10-15 mm. 



In all probability a revision of the Cynipidae will place this species in the 

 genus Andricus, as it closely resembles A. piger Bassett and A. petiolicola Bassett. 



The former is a polythalamous gall produced by the swelling of the petiole 

 or midrib of the Scarlet Oak, Quercus coccinea. The latter is also located on the 

 petiole or midrib of the leaf, but the host in this case is the White Oak, (Juerciis 

 (dba. It is an irregular, spherical swelling draAvn out at some place on its surface 

 into a short tapering projection. At the summit of this is an opening surrounded 

 by a dense ring of coarse, brown trichomes. 



Division No. 5, Pp:terborough Distkict — F. Mourns, Peterbokough. 



My report for the present year again deals chiefly with Cerambycidae. Tlie 

 first series of oIjs erAations made relate to the obscure little A tuiglyptus, Lc Conte's 

 Microclytus (or rather Cyrtophorus) gibbuhts. This insect had been taken in 

 (■onsiderable numbers in 1016 and 1917, feeding on choke-cherry blossom, dog- 

 wood and spiked maple, during the first three weeks of June. In the former 

 season the blossom was well out by June 3rd, in the latter by June 10th. This 

 season I made my way out to the place of capture about the middle of ^lay, and 

 found the corner of the wood where the insect had l)een prevalent already in the act 

 of falling ])eneath the woodman's axe ! It was too early for the blossom and 

 there was no trace of the insect. Before paying the spot another visit. I decided 

 to wait till the end of May. Soon after this decision, however, a hot spell brought 

 the blossoms on with a rush, and I was dismayed on passing a woodyard in the 

 city one day to see a shrub of choke-cherry in full bloom; next day (May 33rd) 

 I hurried out to the '' Wood of Desire " and found the shrubs actually shedding 

 their bloom. I had missed the height of the insect's season. The air that day 

 was cold, and I found only a single specimen. It was the more disappointing 

 that I had arranged to go north over the week-end. However, on Tuesday, May 

 37th, I was back at the hunting ground and had the good fortune to find two 

 or three trees of choke-cherry in a somewhat less exposed position on the nuirgin 

 of the wood ; here I secured more than 30 of the insect, including five natural 

 pairs secured from specimens taken home alive and mating in captivity. Juno 

 proved a very poor blossoming season in our district, and almost no captures 

 Avere made on dogwood, viburnum and spiked maple. Beyond a single specimen 

 of M. gibbulus taken on dogwood on June 1st, I saw no further trace of this 

 elusive little insect. In each of the last three years when it has been captured, 

 the season of its prevalence has been limited to a fortnight and is practically 

 dependent on the blossoming of the choke-cherry clusters; viz.. 191G. June 4-18: 

 1917, June 9-34; 1018. May 30-June 1. 



