1962] 
Slater — -New Genus of Lygaeidae 
45 
position with a definite row adjacent to the claval suture; surface 
nearly glabrous, head, pronotum and scutellum with short semi- 
decumbent setae in the punctures; appendages sparsely but definitely 
pubescent. 
Head non-declivent, moderately acuminate, tylus projecting well 
beyond the juga; first antennal segment about attaining apex of tylus; 
eyes large not produced, strongly in contact with anterolateral pro- 
notal angles; length head .70 mm.; width across eyes .85 mm., 
interocular space .48 mm. ; pronotum evenly narrowing anteriorly, 
lateral margins slightly sinuate, narrowly carinate, bearing 6-7 setose 
tubercles, transverse impression absent mesally but faintly indicated 
by depressed area near lateral margin, dorsal surface slightly convex 
becoming less so in area of calli and anteriorly, length pronotum 1.05 
mm., width pronotum 1.55 mm.; scutellum evenly tumid with 
depressed base, no median carina, length .60 mm. ; corium with broad 
slightly upturned explanate margin, this laterally rounded becoming 
sinuate adjacent to apex of scutellum; apical co-rial margin sinuate, 
concave along basal one-third ; distance apex clavus to apex corium 
1. 10 mmu, distance apex corium to apex membrane .90 mm.; mem- 
brane greatly exceeding apex of abdomen; distance apex abdomen to 
apex membrane .75 mm.; middle and hind femora slightly enlarged, 
with basal one-fourth slender, giving a clavate appearance; labium 
elongate, attaining posterior margin of first abdominal sternite, first 
segment exceeding base of head, second segment extending onto 
anterior portion of mesosternum; length labial segments I .65 mm., 
II .62 mm., Ill .60 mm,, IV .35 mm.; antennae slender, segments 
two and three terete, fourth segment narrowly fusiform ; length 
antennal segments I .25 mm., II .75 mm., Ill .82 mm., IV .70 mm. 
Total length 4.65 mm. 
Holotype: Male. SUMATRA: Pematang S iantar, June 1937. (CT 
& BB Brues). In Museum of Comparative Zoology (Harvard). 
Acknowledgements 
I should like to extend my appreciation to Drs. P. J. Darlington 
and W. L. Brown (now at Cornell University), of the Museum of 
Comparative Zoology, for the opportunity to study this interesting 
Explanation of Plate 2 
Macellocoris incrassatus new species. Drawing by Arthur Smith, British 
Museum (Natural History). 
