602 FAMILY VII. TETTIGONIIDJE. THE CAMEL CRICKETS. 



ulating insect I could detect that there were no absolute pauses between 

 the trills, a very low trilling sound filling in all the intervals. The rhythm 

 is not always quite regular. Sometimes after a succession of trills of ap- 

 parently equal length one may be shortened or lengthened, and then the 

 regular trilling resumed." 



Subfamily VI. GRYLLACRINJE. 



Small or medium sized wingless Tettigoniids, in our species 

 having the head short, globose, face vertical ; vertex broad, two- 

 thirds as wide as interocular space, bluntly rounded, strongly de- 

 clivent ; prouotum covering only prosternum, its lateral carinfe 

 absent ; lateral lobes as deep as long, their front and hind mar- 

 gins broadly rounded into the lower one; meso- and metanotum 

 similar to dorsal abdominal segments, their hind margins trun- 

 cate ; fore and middle femora feebly curved, unarmed beneath ; 

 fore and middle tibia* armed with four long distant spines on 

 each of their lower carinse; hind tibiae armed with four or five 

 spines on each carina. Male with supra-anal plate thickened, de- 

 curved, emargiuate; cerci long, slender, awl-shaped; subgenital 

 plate with a wide deep transverse notch, the lateral projections 

 each bearing at tip a short obtuse style. Ovipositor but slightly 

 longer than hind femora, strongly curved upward, its valves com- 

 pressed, acute. 



According to Kirby the subfamily is represented throughout 

 the world by 15 genera and about 240 nominal species, 172 of 

 which belong to the single genus Gryllacris. But one genus oc- 

 curs in the United States. 



I. CAMPTOXOTUS Uhler, 1864, 548. (Gr., "curved" + "back.") 



Form similar to Ceuthophilus Scudd. Head large, oval, much 

 broader than pronotum, not deeply sunken into it; eyes elongate- 

 ovate, vertical, situated a little behind the basal joint of antenna 1 , 

 and exceeding it slightly in length; maxillary palpi long, tin 1 last 

 joint as long as preceding one, feebly inflated at tip; antenna? at 

 least five times the length of body; dorsal abdominal segments 

 snbequal in length, the last two slightly shorter; legs very short, 

 moderately stout; hind femora armed beneath with two to six 

 very short spines on each carina ; tarsi stout, four-jointed, with 

 split cushions beneath, the first joint equal in length to the two 

 following ones conjoined. Other characters as given under sub- 

 family heading. A single species is known from the eastern 

 I'nited States. 



