1911] Bergrotk — -Xeotropical PlaariinoE 15 



XEW XEOTROPICAL PLOEAEIDs^E. 



By E. Bergroth, 

 Fitchburg, Mass. 



Myiagreutes gen. nov. 



Head elongate, as long as anterior lobe of pronotum, with a deep straight 

 furrow between the eyes, anteocular part seen from above parallel from the 

 eyes to the base of the antennae, then conically produced and sloping obliquely 

 downward, postocular part shorter than the anteocular, somewhat tumid 

 anteriorly, tapering toward the base, its lateral margins slightly sinuate 

 before the middle, eyes large, globular, strongly prominent, throat longitudin- 

 ally moderately convex, antennae inserted about midway between eyes and 

 apex of head, capillary, longer than the body, glabrous (at least in the female) 

 rostrum obtusangularly geniculate between first and second joint, first joint 

 reaching base of antennae, second joint a little shorter than first, reaching 

 anterior margin of eyes, third joint almost as long as the two basal joints 

 together and much more slender. Pronotum in the middle strongly con- 

 stricted and transversely impressed, anterior lobe arched, tapering backward, 

 with a narrow median furrow throughout its length, the sides very slightly 

 rounded, the apical angles with a tubercle armed with a straight spine directed 

 outward and a little forward, posterior lobe campanulate, covering the meso- 

 thorax, moderately declivous, the disk broadly and slightly excavated 

 anteriorly in the middle, armed behind with three spines, one erect in the 

 middle a little before the basal margin and one obliquely ascending above 

 the humeral angles, basal margin truncate. Scutellum twice as broad as 

 long, unarmed but elevated in the middle, angularly gibbous in profile, apical 

 margin slightly rounded, almost as long as the basal margin; postscutellum 

 elongate-triangular, two times longer than scutellum, with a small tubercle 

 before the apex and a short suberect spine at the apex. Prosternum with a 

 longitudinal furrow on each side, the intercoxal process bearing the stridulatory 

 furrow strongly rectangularly elevated. Meso-and metasternum longitudi- 

 nally carinated in the middle. Hemelytra a little narrower than the abdomen 

 (9), corium with the outer apical part narrowly prolonged far beyond the 

 middle of the membrane, inner vein furcate in the middle, forming a long 

 triangular cell, clavus very narrow, membrane rather narrowly rounded at 

 apex, the inner basal cell triangular, very much shorter and narrower than the 

 outer basal cell, this subparallel in the middle and triangularly tapering 

 toward the apex which emits a single simple vein, outer apical cell with a fine 

 simple vein, inner apical cell with a free thick vein emitting branches toward 

 the inner margin. Abdomen ( 9 ) gradually widening from its base to the 

 apex of the fourth segment, then parallel to the apex of the fifth from where 



