260 



ORTHOPTERA OF NOVA SCOTIA. — PIERS. 



length of vertex. They re-appear behind this, but twice as wide apart, 

 diverge to the shoiilders and then converge to the apex, there being offshoots 

 about midway which pass diagonally outward. The dorsal profile of pro- 

 notum at first rises until it forms the beforementioned hump whose greatest 

 elevation is situated at about Mth of its length; then it is depressed, and 

 ^gain rises extremely slightly at about Krd of the length, posterior to which 

 it is nearly straight (with a sUght tendency _ to concavity) to the apex. 

 Lobe of rudimentary wing-cover elliptical, 2}/^ times as long as broad. Femur 

 robust, 3 times as long as its greatest breadth. 



Colour. — Nova Scotian specimens. Cinnamon-coloured, sometimes 

 obscurely fuscous on disk of pronotum between shoulders; hind wings trans- 

 parent, sUghtly iridiscent in some fights, front edge gray-brown, veins dusky; 

 legs cinnamon, more or less mottled with fuscous. (The coloiu" and markings, 

 as in other related species, are subject to considerable variation). 



Measuremznts. — The following detailed measm-ements I have very care- 

 fully taken microssopiaafiy from the three above-described specimens from 

 Truro, N. S., viz. a male collected 17 July, 1913, a female taken on an unknown 

 date, and another female dated 6 Aug. 1913. The last has the apex of the 

 pronotum missing. 



Total length to apex of pronotum 



Length of body to end of abdomen. 



Vertical thickness of thorax 



Head, length 



Distance between extreme convexity of eyes .... 



Width of vertex 



Vertex projects in front of eyes 



Pronotum, length 



" anterior width 



" width at shoulders 



Lateral caringe of pronotum, separation at 



anterior end 



Lateral carina? of pronotum, separation at 



shoulders 



Front of pronotum to more prominent hump of 



median carina 



Front of. pronotum to less prominent hump of 



median carina 



Pronotum extends beyond abdomen 



Lobe of rudimentary wing-cover, length 



" " " " width 



Hind wing 



Hind femur, length 



" width 



Hind tibia 



Valves of ovipositor 



Apex of femur to apex of pronotum 



Male 



Female 



17-7-13 





mm. 



mm. 



8.95 



10.00 



7.23 



9.25 



2.45 



3.00 



.90 



1.00 



1.50 



1.75 



.70 



.90 



.11 



.09 



7.90 



9.00 



1.67 



2.00 



3.23 



3.90 



.85 



1.10 



2.35 



2.90 



.95 



1.25 



2.30 



3.00 



1.65 



1.40 



1.62 



1.75 



.63 



.75 



6.20 



6.50 



4.85 



5.60 



1.65 



1.90 



4.10 



4.70 





1.10 



1.00 



1.10 



Female 

 6-8-13 



mm. 



9.40 

 2.85 

 i.08 

 1.75 

 .87 

 .12 



2.15 

 3.90 



1.00 



2.80 



1.15 



2.90 



'i.85 



.78 



1.28 



Range. — The range of this northern race of A. arenosum has not been 

 fully worked out, but it occurs in Nova Scotia, New Hamp., and Mass 

 (Hebard coll.), southern Ont. (Walker, as obscurirm), Minn. (Somes, as obi 



