236 FAMILY VI. ACRIDID^. THE LOCUSTS. 



hind tibiae bent back snugly against the femora during the move- 

 ment, and grate the thighs against the outer surface of the teg- 

 mina. The first one or two movements are frequently noiseless or 

 faint. In sunny weather the notes are produced at the rate of 

 about six a second, are continued from one and a half to two and 

 a half seconds, and when undisturbed are repeated with intermis- 

 sions of from five to six seconds (Fig. 81, c.). When the sky is 

 overcast the movements are less rapid." 



Piers (1918, 2(39) says that the stridulation or call of curti- 

 pennis "sounds like the lisping syllables thru. thru. thru, repeated 

 from about seven to ten times and lasting altogether three or four 

 seconds. It is a soft, dreamy, lulling sound of the country and 

 quite characteristic of a quiet, hot forenoon in August and Sep- 

 tember and is still heard (in Nova Scotia) in October." 



The Ktcno'bothrus lonf/i^cnnis Scudder (1862. 457) was a name 

 given to the long-winged form and the 8. colorailcnsis McNeill 

 (1897, 262) is a synonym. 



II. AGENEOTETTIX McNeill, 1897a, 71. (Gr., "beardless" -\- 



"grasshopper.") 



Short, rather stout species having the vertex feebly declivent, 

 its sides sharp and meeting in front almost at a right angle, 

 lateral foveola? very distinct, rectangular or four-sided, about twice 

 as long as broad; frontal costa with sides feebly diverging from 

 vertex to clypeus, sulcate only around and below the ocellus; an- 

 tenna? slightly, female, or distinctly, male, longer than head and 

 pronotum together; pronotum with median carina, cut once be- 

 hind the middle by the principal sulcus, lateral carina? strongly 

 sinuate or curved inward, hind margin of metazona broadly 

 rounded or obtusely angulate; lateral lobes of pronotum deeper 

 than long, their front and hind margins nearly straight and ver- 

 tical, lower margin with its front half strongly ascending; teg- 

 mina and wings well developed, slightly shorter than or equalling 

 the abdomen, female, usually slightly surpassing its tip, male; 

 hind femora rather stout, distinctly surpassing the tip of ab- 

 domen, male, equalling it, female; hind tibia? with 9 11 spines 

 on outer margin ; subgenital plate of male broadly, obtusely con- 

 ical ; valves of ovipositor but little exserted, the tip only being 

 visible. 



Kirby (1910, 134) accredits six species to Agcneotctti.r, all 

 from the United States. Of these only the Chrt/sochraou clcorum 

 Scudd. (1876a, 262) occurs east of the Mississippi. An examina- 

 tion of the types of three of the others, viz., Anlocara scudderi 



