May, 1907.] A Collecting Trip North of Sault Ste. Marie. 
*47 
some of the Libellulines such as Libellula incesta and Plathemis 
lydia. Another species of Somatochlora was taken along Achigan 
Brook, but unfortunately it was broken into fragments by the 
ring of the insect net, rendering identification at the time impos¬ 
sible, and the fragments were subsequently lost. 
Somatochlora williamsoni Walker. Oden, Michigan, Aug. 
11th. Two males; I have in my collection a male of this 
species collected by M. K. Williamson at Oden, on Aug. 14, 1904. 
24. Cordulia shurtleffi Scudder. Stony Lake, Aug. 3d. A 
single teneral male taken. 
25. Dorocordulia libera Selys. Stony Lake, Aug. 3d, a 
single male which frequented a small area of water, floating logs 
and fallen tree tops. 
26. Leucorhinia frigida Hagen. Stony Lake, Aug. 3d and 
4th. Two males and two females. Associated with the next two 
species at Stony Lake. The three species were frequently found 
resting on all possible supports a short distance from the water 
and over the water a short distance from the shore, about the 
pond-like lower end of the lake. Frigida seemed to prefer, how¬ 
ever, the dead twigs of fallen tree tops lying in the water some 
distance from the shore. 
27. Leucorhinia proxina Calvert. Heyden, July 31st and 
Aug. 3d and 4th, Searchmont, Aug. 6th. Twenty males and 
fifteen females. All of these excepting three females, two taken 
July 31st and one Aug. 6th, were taken at Stonv Lake. One of 
these males I at first thought represented another species, 
because of the following characters: the basal branch of the 
hamule is bent down on the hamule; the triangle of the front 
wing is followed by three cells, then three, then increasing; and 
the labium is varied with pale areas. The specimen was referred 
to Dr. Calvert who called my attention to Hagen’s notes on the 
folding of the basal branch of the hamule (Svn. Od. Genus 
Leucorhinia, pp. 229-236, Trans. Am. Ent. Soc. XVII, July, 
1890). Also a tabulation of venational characters of specimens 
in Dr. Calvert’s collection shows that proxima has the triangle of 
the front wing followed by three rows of cells, increasing, or bv 
three rows, then two, then increasing. Moreover, there is con¬ 
siderable variation in the color of the labium in this species. 
28. Leucorhinia glacialis Hagen. Stony Lake, Aug. 3d and 
4th. Five males. One male has the lower basal cell in both 
hind wings twice crossed. 
29. Leucorhinia intacta Hagen. Sault Ste. Marie, Ontario, 
July 29th. One female. 
30. Sympetrum obtrusum Hagen. Sault Ste. Marie, Ontario, 
July 29th and 30th. Heyden, July 30th and 31st and Aug. 3d. 
Searchmont, Aug. 1. 6 and 8th. Oden, Mich. Aug. 11th and 12th, 
and Aug. 14th and 26th (J. H Williamson). Forty males and six 
