34 THE CANADIAN ENTOMOLOGIST, 



Order Coleoptera (coleos — a sheath, pteron — a wing). Beetles. — A 

 pair of horny wing-covers, which meet in a straight line down the back, 

 and beneath which there is a single pair of membranous wings. Eleven 

 thousand known kinds in Canada and United States. 



Order Diptera (dis — two, pteron — wing). Flies, mosquitoes, etc. — 

 Only two wings. 



Order Lepidoptera (lepis — a scale, pteron — wing). Butterflies and 

 moths. Four membranous wings covered with overlapping scales. 

 Seven thousand known kinds in Canada and U. S. Butterflies. — 

 Clubbed antennae ; fly only in day time, and usually hold the wings erect 

 above the back when at rest. (A few moths have clubbed antennae, many 

 fly by day, but no moth presents all three of the above characteristics). 

 Seven hundred kinds in Canada and U. S. Moths. — Antennae not 

 clubbed ; fly generally at night ; wings not held erect when at rest. Six 

 thousand four hundred kinds in Canada and U. S. 



Order Neuroptera (neuron — a nerve, pteron — -a wing). The Lace- 

 wings. — Four wings with numerous veins and cross-veins. 



Order Hemiptera (hemi — half, pteron — wing). Bugs, lice, aphides, 

 etc. — With four wings, or wingless. 



Order Orthoptera (orthos — straight, pteron — wing). Crickets, grass- 

 hoppers, etc. — Four wings, first pair thickened and overlapping when at 

 rest ; second pair thinner and folded in plaits like a fan. 



Order Odonata (odous — a tooth). Dragon-flies. — Four wings, finely 

 netted with veins ; hind wings as large, or larger, than fore wings ; each 

 wing has near the middle of the front margin a joint-like structure, the 

 nodus. 



NOTES ON THE LOCUSTID^ OF ONTARIO. 



BY E. M. WALKER, B. A., M. B., TORONTO . 



(Continued from p. 341, Vol. XXXVI.) 



14. Orchelimum vulgare, Harr. The Common Meadow Grass- 

 hopper. 



Orchelimuvt vulgare, Harr., Ins. Inj. Veg., 1862, 162. 



Xiphidium agile, Redtenb., Verh. zool.-bot. ges., Wien., 1891, 186 (in 

 part). 



Orchelimum agile, Scudd., Proc. Davenp. Acad. Nat. Sc, VIII., 1900, 



73- 



Measurements : Length of body, male 18 mm., female 18.5 mm.; of 



pronotum, male 5 mm., female 5.4 mm.; of hind femora, male 14 mm,, 



February, 1905. 



