254 ORTHOPTERA OF NOVA SCOTIA. PIERS. 



germinating seeds. Despite the similarity of the name of 

 this subfamily with that of the Acridinm, the beginner must 

 be careful to discriminate between the two names (see footnote 

 or preceding page). 



The use of trinomial names, such as Acrydiutn ornatum 

 ornatum and A. ornatum triangulare, to distinguish the 

 so-called long- and short-winged extreme phases of dimorphic 

 species such as often occur in this subfamily, is discouraged 

 by late writers, as being of but little if any real value, as 

 the two extreme forms intergrade and interbreed. This is 

 evident to those who have examined a large series of speci- 

 mens from many regions or even from one locality. 



Key to Nova Scotian Genera of Acrydiin.^ (Grouse Locusts). 

 a. AntemiEe 12 — IS-jointed; median carina of pronotum high and crest-like, 

 arched longitudinally; upper lateral sinus of pronotum about half as 



deep as lower one Nomotettix. p. 254. 



aa. Antennae usually 14-iointed; median carina of pronotum low and rather 

 flat when viewed from side; upper lateral sinus of pronotum nearly as 

 deep as lower one Acrydium. p. 2,56. 



Group Tetfigiae. 

 3. Nomotettix cristatus (Scudder). Crested Grouse- 

 locust. (Short-pronotumed form.) 

 Nomotettix cristatus. Gooderham, Proc. Ent. Soc. N. S. 



for 1916, 23, 27 (1917); Colchester Co. 

 Description. — Nova Scotian specimen. This is the smallest of our 

 Orthoptera, and may be readily recognized by the high arched pronotum, 

 or bowed outhne of the dorsal line when viewed from the side. Body finely 

 granulate, most noticeable on pronotum. Antennae of 12-13 joints. Vertex 

 .8 mm. wide, projecting beyond eyes, the front margin rounded when seen 

 from above, and anterior end of median carina forming a small median pro- 

 jection; pronotum with the front margin produced in an angle over back of 

 head to posterior quarter of eye; median carina raised as a high crest and 

 arched lengthwise for about thiee-fourths its length, then sloping down and 

 more nearly horizontal near apex; upper notch or sinus on hind margin of 

 lateral lobe of pronotum very shallow, less than half as deep as lower sinus; 

 pronotum reaching to apex of hind femora (abbreviated form, sometimes 

 called C. cristatus cristatus*); front femora more or less compressed, carinate 

 above. 



Colour. — Nova Scotian specimen. Grayish fuscous-brown, slightly 

 Ughter below posterior lateral carina of pronotum and on hind tibia, the 

 dark colour continuing for a short distance below knee; on each side of disk 

 of pronotum are two irregularly shaped black marks enclosing a small gra>- 



♦Tlie long-pronoturrifd form, son.ciimo!) called A'. irtSiOiUS cannatus (t^cudder), in 

 which thft [jronotum is furtlu-r elongated by a coui'le of millimeters, has not been found in 

 Nova Scotia. • 



