134 FAMILY V. — PENTATOMIDjE. 



of a swale; in the latter, swept from goldenrod. Pine, Lake 

 Co., and Mineral Springs, Porter Co., Ind., May 21 — Sept. 4 

 {Gerhard) ; on lake beach and in a tamarack swamp. A mem- 

 ber of the Alleghanian fauna and, except on the high wooded 

 slopes of Crawford County, occurring in Indiana only in the 

 northern portion and there apparently very scarce. Its known 

 range extends from New England to Michigan and northern 

 Illinois, south to Maryland. Specimens from North Muskegon, 

 Mich., and Willow Springs, 111., are in the Gerhard collection. 

 Hart (1919, 192) records it from Dubois and Muncie, 111. 

 Olsen (1912, 52) states that on Long Island, N. Y., it is 

 "locally common throughout the pine region and on Rockaway 

 Beach in the washup. I have found it common in the pine 

 woods by beating the scrub oak." It is our smallest and most 

 depressed member of the genus and is easily distinguished by 

 the characters given in key. 



88 (125). Euschistus tristigmus (Say), 1831, 4; I, 314. 



Elongate-oval, subdepressed, size small for the genus. Above dull 

 gray, thickly and rather evenly marked with small fuscous punctures; 

 narrow edge of side margins of pronotum and extreme tip of scutellum 

 yellow; membrane fuscous-brown, usually with a number of vague small 

 darker spots, the tip often paler; under surface dull yellow sprinkled 

 with reddish points; middle of abdomen with from one to four black 

 spots, the one on sixth ventral the largest, oval or oblong and very 

 rarely absent, the others on ventrals 3 — 5 varying in size and often in 

 part or wholly wanting; incisures at ends of ventrals 3 — 6 with a black 

 point; sides of abdomen often with two rows of vague fuscous spots; 

 legs yellow flecked with brownish dots. Head very fiat, slightly longer 

 than wide, tylus equalling or very feebly surpassing the cheeks. Prono- 

 tum with side margins broadly concave, their edge very finely crenulate, 

 male, more coarsely so, female; humeral angles obtuse; disk with punc- 

 tures dense along the margins, more sparse elsewhere, with numerous 

 smooth small whitish areas intervening. Scutellum with similar narrow 

 and more elongate transverse areas. Elytra evenly and finely punctate, 

 marked with a few scattered white smooth dots. Connexivum narrowly 

 exposed, each segment fuscous with a rounded dull yellow median spot. 

 Abdomen very finely rugosely punctate; thoracic pleura coarsely marked 

 with reddish punctures. Genital plate of male with its hind margins 

 broadly and shallowly concave, the concavity limited each side by a short 

 obtuse tooth. Length, 10 — 11 mm.; width, 6.5 — 7.5 mm. 



Frequent throughout Indiana, Feb. 14 — Dec. 12. In this 

 State it hibernates singly or in groups of two to four, beneath 

 cover of various kinds, especially beneath logs, chunks or 



