MORGAN HEBARD 149 



seen to increase the distance covered by their great leaps by the 

 use of their reduced wings. Individuals made every effort to reach 

 another joint-cactus when driven out and whenever this was 

 accomplished they hid almost instantly. At Corpus Christi the 

 species was found very locally, but in moderate numbers, in the 

 cactus and surrounding low halophytic vegetation of the exten- 

 sive sandy flats bordering the bay. At all other localities rare 

 individuals were located always in clumps of joint-cactus in dry 

 sandy areas. 

 Paraidemona latifurcula new species (Plate VIII, fig. 11.) 



This insect, which in size averages smallest of the species of 

 the present genus, is readily distinguished in the male se.x by the 

 very distinctive type of furcula. Females can be separated from 

 those of P. fratercula, here described, only by the prosternal 

 spine which is blunter in latifurcula. Both of these species 

 average decidedly smaller than P. mi mica Scudder, but in the 

 Brownsville region of Texas a decided reduction in size is found 

 to occur frequently in that insect. 



In linear arrangement this species should l)e placed first in the 

 genus, followed hy fratercula. 



Type. — cf ; Brownsville, Cameron County, Texas. July 31 to 

 August 5, 1912. (Hebard.) [Hebard Collection, Type No. 476.] 



In all respects the type agrees with a paratypic male of ynimica,^ except ia 

 the following features. Size very small (averaging smallest of genvis); form 

 moderately robust. Furcula a broad, transverse, l)riefly projecting plate, 

 about three times as wide as long, with brief lateral margins straight and 

 weakly convergent to the sharply l)ut briefly produced, acute latero-caudal 

 angles, caudal margin straight, transverse, between these. Supra-anal plate 

 with lateral margins moderately convergent in proximal third, its surface 

 showing a transverse ridge at this point; in distal two-thirds triangular, this 

 portion about as long as its basal width,. the lateral margins moderately con- 

 cave and more strongly convergent to the strongly acute-angulate rounded 

 apex, surface of this portion showing a rather sharp medio-longitudinal sul- 

 cation. The supra-anal plate is decidedly more narrowly triangularly pro- 

 duced than in any other species of the genus. Cerci simple, slenderly acute 

 conical, hardly two-thirds as long as supra-anal plate. Pallium very large and 

 convexly {jrotuberaat, as in mimica. Subgonital plate very small, fitting into 

 the deep and regular concavity of all but the jiroximal portion of the caudal 

 margin of the preceding segment; free dorsal margin of subgenital plate rather 



8 We would note that in all the species of Paraidemona the caudal margin 

 of the jironotum is weaklj^ concave, and both tegmina and wings are absent. 



TR.-VNS. AM. KNT. SOC, XLIV. 



