SUBFAMILY V. DECTK'IXvE. 597 



stationary. Their activities are chiefly nocturnal and work with 

 a flash lamp will sometimes reveal them in many situations." 



Davis (1911a) mentions the finding of eight specimens of 

 this large Orthopteron in a single burrow of the wasp, Chlorion 

 icJincKinonea L., the ''cricket 1 ' being so clumsy in motion that it 

 easily falls a prey to the wasp. He also states (1915a) that this 

 and other species of Atlunticus "are often attracted to the trees 

 sugared for moths and they may be likewise collected in traps 

 consisting of jars or old tin cans sunk in the ground and baited 

 with molasses. More females than males seem to be attracted by 

 the above methods." 

 280. ATLANTICUS GIBBOSUS Scudder, 1894a, 180. Robust Shield-bearer. 



Large for the genus; form robust. Pale brownish-yellow to cinna- 

 mon-brown, more or less sprinkled with fine fuscous markings; upper 

 half of lateral lobes usually blackish-fuscous. Fastigium wider than basal 

 joint of antennae, its tip broad, rounded. Pronotum with disk large, 

 strongly produced backward, its hind margin broadly and evenly rounded; 

 lateral lobes twice as long as deep, lower margin short, oblique, its front 

 angle obtuse, hind angle very broadly rounded, hind margin very long, 

 humeral sinus scarcely evident. Tegmina usually concealed in both sexes, 

 rarely feebly protruding in male. Hind femora very stout, about two and 

 a half times the length of pronotum, their inner lower margin armed with 

 two to nine short spines. Male with notch of subgenital plate deep, nar- 

 row; styles short, obtuse; cerci as in key and Fig. 197, Z>. Female with sub- 

 genital notch narrowly U-shaped, the lobes each side broadly rounded 

 (Fig. 194, f.} Ovipositor straight, twice or slightly less than twice as long 

 as pronotum, its apical fifth tapering above, and tip therefore ventral 

 (Fig. 195, fir.) Length of body, $, 2633, 9, 2734.5; of pronotum, $, 

 11.614, 9, 12.514.7; of hind femora, $, 28.534.8, 9, 31.737; of ovi- 

 positor, 25 29 mm. Greatest width of pronotum, $ , 6.7 7.9, 9 , 7.1 8.2 

 mm. 



Dunediu, Fla., July IT) Oct. 20 (TV. 8. /?.) ; Lake City, Fla., 

 May 28 (Crfiiiicftrilli' Coll.}. Recorded also from numerous places 

 in the northern part of Florida, Ft. Reed being the most southern 

 station on the east coast and Dunedin on the west one, at which 

 it has been taken. About Dunedin the young are quite common 

 in dry open pine and scrub-oak woods during March and April 

 and probably reach maturity in June. At Pablo Beach R. & H. 

 found it in palmetto scrub and salt marsh. They state (1907) 

 that the adults "possess greater strength in the jaws than any 

 other North American orthopterous insect known to us. A single 

 bite can easily pierce the cuticle and cause the blood to flow. In 

 consequence the field collector quickly acquires a wholesome re- 

 spect for their defensive abilities. Individuals showed surprising 



