398 FAMILY VI. ACKIDIDJE. THE LOCUSTS. 



sandy soil at Carrabelle, and few in oak clumps at from two to 

 five feet from the ground at Ocala, in an environment very similar 

 to that at Woodville. The species, like davisi, is thanmophilus, 

 not rapid in movement, but extremely powerful in leaping and un- 

 usually able in hiding in the oak undergrowth to which it is 

 peculiar." 



An examination of the type series of both davisi and querci- 

 cola showed that the entire general fades of the two is the same ; 

 the color varying only in the slightly greater width of the dark 

 pronotal stripe in the female of davisi. The definition between 

 the dorsal and lateral fields of tegmiua in that species is very 

 slight and evident only in the females. The only difference of any 

 note between the two is, therefore, that of the form of the male 

 cerci as described in key, and this also is not greater than that 

 shown among races of other species of short-winged Melanoplus. 

 I therefore regard quercicola as only an incipient race or variety 

 of davisi, it bearing the same relation to davisi that acidocercus 

 does to carncgiei. In fact all four forms are so closely related 

 that the tyro will have much difficulty in separating them. The 

 cerci of davisi are of the same form as those of carnegiei, the fig- 

 ure 13 of Hebard (1918, PI. VIII) showing the apex entirely too 

 blunt. 



Series VII. THE FASCIATUS GROUP. 



Medium or large-sized species of robust form and dull hue, hav- 

 ing the antennae about as long as, male, or two-thirds as long, fe- 

 male, as hind femora; prozona usually quadrate, flat or feebly 

 tectiform, rarely more than one-fourth longer than metazona, its 

 sides parallel, front margin truncate; metazona flat, its sides 

 parallel, male, usually, but never strongly, diverging, female, its 

 hind margin obtuse-angulate ; median carina low but distinct on 

 metazona, absent or with a trace near front margin only on pro- 

 zona; lateral carina^ wanting; tegmina sub-lanceolate, distinctly 

 longer than pronotum, covering from one-half to three-fourths the 

 abdomen, their tips narrowly rounded or subacute, inner margins 

 overlapping, dorsal and median areas sharply defined ; prosternal 

 spine variable; hind femora bifasciate with fuscous on upper and 

 outer faces; hind tibijp normally \vholly or in great part red, often 

 with basal third pale, the spines black ; abdomen compressed, car- 

 inate, more strongly so in female, the extremity in male enlarged, 

 upcurved; furcula, when present, very short, flattened, oblong or 

 triangular projections lying on the sides of the median ridges of 

 supra-anal plate; cerci and subgenital plate variable in the dif- 

 ferent species. 



