120 FAMILY V. — PENTATOMID.^. 



streams;" while Van Duzee (1904, 54) says that on the dry 

 arid prairies of Colorado and Utah he found it "exceedingly 

 common on a low species of Atraplax having a whitish-green 

 foliage. On these bushes the insect assumes a green gray color 

 assimilating to the color of its surroundings." 



78 ( — ). Thyanta pseudocasta sp. now 



Oval, narrowed behind, subdepressed. Above dull greenish-yellow, 

 more or less tinged with reddish; antennae greenish or greenish-yellow, 

 the apical third or more of joints 3 and 4 reddish; membrane whitish- 

 hyaline, flecked on basal half with numerous faint fuscous marks; con- 

 nexivum pale, the extreme apical angle of each segment blackish ; under 

 surface and legs a nearly uniform greenish-yellow; tarsi, and sometimes 

 numerous minute scattered blotches on abdomen, fuscous. Head oval, 

 flat, as wide across the eyes as long; cheeks equalling tylus; joints 3 — 5 

 of antenna? subequal, each one-fourth longer than 2. Pronotum with 

 front portion strongly declivent; sides feebly but distinctly concave, 

 humeral angles obtuse; disk with fine transverse ruga?, surrounding ir- 

 regular groups of three or four punctures. Scutellum with similar ruga? 

 on basal two-thirds; its sides strongly converging, tip narrowly rounded, 

 but slightly surpassing the lower inner angle of corium. Connexivum 

 very narrowly or not at all exposed. Elytra evenly not densely punctate 

 without rugae or smooth areas. Abdomen with sides finely alutaceous, 

 minutely and sparsely punctate, the median area smooth. Genital plate 

 of male widely, evenly and shallowly concave, its apical margin broadly 

 deflexed, without visible lateral or median lobes. Length, 7 — 8 mm.; 

 width, 4 — 5 mm. 



Miami, Cape Sable, Caxambus and Key West, Fla., Feb. 23 — 

 April 5. A submaritime and probably a neotropical species 

 taken in some numbers at each station by beating vines and 

 other foliage along the margins of dense hammocks. Allied to 

 casta but much smaller and darker, more tapering behind, with- 

 out trace of black spots on thorax or ventrals and with a much 

 more widely emarginate genital plate of male. It is our only 

 species having the third joint of antennae distinctly longer 

 than second. 



SUBTRIBE II OF PENTATOMINI. 



Species varying much in form, size and hue, but agreeing in 

 having the osteolar opening rounded, and usually with either a 

 small curved anterior auricle, or a canal, which is very short 

 and ends abruptly, not drawn out and gradually evanescent as 

 in Subtribe I ; second ventral, as there, without a forward pro- 

 jecting tubercle or spine. The cheeks are rarely (Ncottiglossa 



