SUBFAMILY III. — ORTHOTYLINjE. 799 



suture separating the propleura or flanks of pronotum from 

 the disk. 



I. Semium Reuter, 1876, 80. 



Small oblong opaque species having the head short, broad, 

 inserted in thorax to eyes, its front subvertical ; beak reach- 

 ing middle coxae; pronotum strongly narrowed and declivent 

 from base to apex, base more than twice the width of apex, 

 front portion of disk with two transverse impressions, hind 

 portion strongly convex; elytra entire, surpassing tip of abdo- 

 men; second joint of hind tarsi nearly twice the length of 

 first. One species is known. 



839 (1186). Semium hirtum Reuter, 1876, 80. 



Oblong, subcuneiform. General color velvety-brown; head, joints 1 

 and 2 of antennae, and legs except tarsi, strongly tinged with reddish; 

 apical fourth and flanks of pronotum reddish-yellow; scutellum, em- 

 bolium, corium except apex and cuneus except tip, yellowish-white; mem- 

 brane fuscous-brown; tarsi and joints 3 and 4 of antennae dusky brown. 

 Joint 1 of antenna? very short and stout, its length scarcely half the 

 width of vertex ; 2 almost as stout and five times as long as 1 ; 3 and 4 

 much more slender, 3 subequal in length to 2, nearly three times longer 

 than 4. Length, 2.8 — 3.4 mm. 



Marion Co., Ind., Sept. 12 — Oct. 6, swept from Euphorbia 

 along roadsides and railway embankments. Ranges from New 

 York west to Iowa. Described from Texas and recorded from 

 California. Occurs on the reddish under surface of the leaves 

 of spurge {Euphorbia). 



Tribe III. HALTICINI Kirkaldy, 1906, 130. 



Small oval robust species having the head broad, its hind 

 margin usually sharp, concentric with or overlapping the front 

 margin of pronotum ; antennae slender, often as long or longer 

 than body; beak reaching to or beyond middle coxae; pronotum 

 trapezoidal, sides straight, not carinate, calli distinct in the 

 winged forms ; scutellum triangular ; mesoscutum usually con- 

 cealed; elytra often dimorphic, the brachypterous form with 

 cuneus and membrane frequently wanting. Other characters 

 as in tribal key. 



Knight (1923, 498) assigns four of our eastern genera to 

 the tribe, two of which Van Duzee classed under the tribe 

 Orthotylini. Some of the species are widely distributed and at 

 times very injurious. 



