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FAUNA OTTAWAENSIS. 
Hymenoptera Phytophaga. 
By W. Hague Harrington. 
The subjoined list, of that important section of the Hymenoptera 
which is most injurious to plant life, is offered as a contribution to the 
knowledge of our local Fauna. The list was prepared last winter and 
the numbers given for each species are those of the insects then in my 
collection, irrespective of such specimens as may have been given away 
or exchanged. These numbers are an indication of the relative abun- 
dance of the species and of the sex or sexes represented. The captures 
of the season just closed have not been arranged, but it is improbable 
that any additions have been made to the species previously captured. 
When they have been carefully examined, any items of interest regard- 
ing them will be recorded. The dates quoted for each species are the 
earliest and latest shown on the labels attached to individuals of that 
species. All the specimens are not, however, dated, and so no dates 
can be given for several of the species. All the species have been col- 
lected since the organization of the Ottawa Field Naturalists 
Club, in the city or adjacent country, and several of the rarer species 
have been contributed by Mr. Fletcher and Prof. Guignard. Several 
of the species collected seemed apparently new f .o science and have 
been described by Provancher (Faune Entomologique du Canada, Vol. 
ii, Additions) or by the author (Canadian Entomologist Vols. \vi, xxv) 
and are those in the list of which types are indicated as in the collec- 
tion. 
Subsection Phyllophaoa. 
This division contains the species feeding upon the foliage of 
various plants, and consists of the family Tenthredinida;, of which the 
adult insects are popularly, and appropriately known as Sawflies. The 
female has the ovipositor modified to form a more or less acutely toothed 
saw, with which a slit can be made in a leaf or twig for the reception of 
the egg. Some species have the saw feebly developed and make but a 
slight incision, or even (as the Gooseberry Saw fly) merely attach the egg 
