Vol. XI] VAN DVZEE—NEW HEM1PTEROUS INSECTS H5 



longer than I. Antennae slender; segment I scarcely surpassing apex of 

 head, III and IV subequal, fusiform, and with the apex of II sparsely pilose. 

 Pronotum about a fifth broader than long, moderately convex, minutely 

 punctate near the hind margin; sides about parallel, very obsoletely sinuated 

 posteriorly, carinate with a concentric groove beneath ; anterior angles rounded. 

 Elytra in type material brachypterous, truncate at apex, clavus and corium 

 connate, their surface minutely confused punctate. Abdomen polished, minutely 

 punctate; suture between third and fourth ventral segments straight and 

 attaining margin of connexivum in female, slightly bent and becoming nearly 

 obsolete on connexivum in male. Pleurae polished, impunctate; osteolar canal 

 slender, curved backward along hind margin of a broad opaque area. An- 

 terior femora much dilated, unarmed, anterior tibiae strongly curved and ex- 

 panded at apex with the basal segment of its tarsus as long as the apical two 

 together. 



Color, head, pronotum and elytra piceous or almost black, the hind margin 

 of pronotum slightly castaneous; abdomen brown, segment I and base of II 

 paler; rostrum and legs honey-yellow. 



Described from five males and three females taken at 

 Redwood Canyon, Contra Costa Co., Calif., February 11, 

 1920, from nests of wood rats, by Mr. J. O. Martin, to 

 whom this species is gratefully dedicated. In addition, two 

 male paratypes were taken by Mr. Martin from Berkeley 

 hills, August 28, 1919. This tiny species is interesting in 

 showing a difference between the sexes in the course of the 

 suture between the third and fourth ventral segments. I am 

 unable to detect the posterior opaque spot on fourth seg- 

 ment but probably it is distant from anterior if present at all. 



Holotype, male, No. 756, and allotype, female, No. 757, 

 Mus. Calif. Acad. Sci. ; paratypes also in the Academy's 

 collection. 



Type locality, Redwood Canyon, Contra Costa Co., Calif. 



6. Eremocoris semicinctus, new species 



Aspect of obscurus but larger and rougher punctate with 

 long-setose hind tibiae and concolorous base of elytra bor- 

 dered only with pale in male, anterior femora with large 

 teeth. Length 9 mm. 



Male: Head a little longer than broad across the eyes; bucculae not 

 attaining base of antennae, segment I of antennae passing clypeus by two- 

 thirds its length; II a third longer than I; III two-thirds of II; IV two- 

 thirds of III; rostrum attaining base of hind coxae, segment I slightly passing 

 base of head, II fully equal to III and IV together; mesosternal groove 

 deep, the angular elevated sides forming a roughened tubercle; osteolar canal 

 long, a little less than right-angled. Pronotum large, parallel, its length 

 and width subequal ; constriction shallow, at basal fifth; anterior lobe long, 

 unusually convex, obscurely punctate, posterior flat, coarsely punctured; collum 



