12 Proceedings, 1922 



Crop and Garden Insects, Dominion Entomological Branch, that this 

 earwig- has increased to such an extent in the City of Vancouver during 

 the past few years as to cause considerable discomfort and annoyance in 

 houses and gardens throughout the City, and that it has spread to New 

 Westminster and probably to Victoria on Vancouver Island also. In 

 examining a considerable series of these insects collected by Mr. Tre- 

 herne in Vancouver it is apparent that the long-callipered variety (For- 

 ficula auricularia var forcipata Stephens), is common and in the material 

 examined was found to be more numerous than the typical auricularia 

 Linnaeus. 



Locality records. Vancouver, 1916. New Westminster, 1921 



(R. C. Treherne). 



BRITISH COLUMBIA ORTHOPTERA 



Order ORTHOPTERA 

 (Straight-winged Insects) 



All true insects can be placed into one of two main divisions, de- 

 pending upon their method of development from the egg to the adult. 

 In the first division — the Metabola — are placed those insects having a 

 "complete metamorphosis." In this division the insect passes through 

 four distinct phases ; the egg, the larva, the pupa and the imago. 



In the second division — the Heterometabola — are placed those 

 insects having an "incomplete metamorphosis." In this division, to 

 which the Orthoptera belong, the young insect on emerging from the egg 

 resembles the adult in general form, but is wholly wingless and the 

 sexual organs are undeveloped. These young insects are known as 

 nymphs, and the change from the newly hatched nymph to the adult — or 

 imago — is gradual and scarcely noticeable. 



As the Orthopterous nymph grows it sheds its skin from five to seven 

 times, varying in the different families of the Order. The wings gradu- 

 ally develop until at the final moult it emerges mature or in the imago 

 stage. 



The insects of the Order Orthojjtera may be distinguished from those 

 of the other Orders of the division Heterometabola by the following char- 

 acteristics: Mouth parts formed for biting and chewing; the fore 

 wings — or tegmina, — when present, stiff but not horny, usually protec- 

 ting the larger and more delicate hind wings, which, when at rest, are 

 folded fanwise. Legs adapted for running — Grylloblattidae, Blattidae, 

 Phasmidae, Mantidae — or for leaping — Acrididae, Tettigoniidae, Gryl- 

 lidae. 



