1861] 21 



Descriptions of a few new species of HEMIPTERA, and observations upon some 



already described. 



By p. K. Uiilkr. 



PACHYCORIS. ]5lirui. 



P. dissociatus . — Form of P. Faliricii, Liun., greenish or bluish 

 black, shiuing; head deeply, rather closely, coiifluently piuictnred ; 

 antennae black; rostrum piceous; eyes brown; ocelli testaceous; thorax 

 sparsely, shallowly punctured, punctures rather dense in the transverse 

 impression behind the head, lateral margins recurved, slightly sinuated ; 

 the usual tubercular prominence at the humeral angles, interior to which 

 is a short longitudinal impression; scutellum punctured like the thorax, 

 punctures becoming closer against the lateral and posterior margins, 

 before the apex slightly depressed, basal fossae very deep, prolonged 

 in a less deep impression, obliquely inwards, behind the fossas, near the 

 lateral margin is a shallow depression ; corium deep black, finely, 

 closely punctured ; beneath polished, coarsely, confluently punctui'ed, 

 punctures becoming shallower and more sparse upon the sides of the 

 venter, middle of the venter to the tip destitute of punctures, finely 

 polished, blue-black; legs black, shining, pubescent. 



Length 7i lines. Humei-al breadth 4| lines. 



Uab. — New Leon, Mexico. (Lt. Couch.) Cabinet of the Smithso- 

 nian Institution. 



MACRAULAX, Dallas. 



M. tristis. — Robust, convex, fuscous, irregularly^ marbled with 

 black; head closely, confluently, deeply punctured with black; antennae 

 blackish fuscous, pubescent, compressed, second and third joints sub- 

 equal, fourth and fifth about equal, basal joint shortest; rostrum reach- 

 ing the penultimate segment, piceous, first joint, base of the second, 

 and articulation of the fourth testaceous, second a little longer than 

 the third, fourth shortest; central lobe of the head projecting beyond 

 the lateral ones ; ocelli red; thorax less closely punctured, punctures 

 confluent in spots, especially towards the sides and humeri, lateral 

 margins hardly recurved, slightly sinuated, a rather deep impression 

 behind each eye, a larger one near the lateral middle, and a longitudi- 

 nal, oblique one interior to each humeral tubercle; scutellum punctured 

 like the thorax, rather less densely so upon the disk, basal- lateral impres- 

 sions rather deep, small, roundish against the thorax, interior to each 

 impression is a small, round black spot; corium punctured like the scu- 

 tellum, membrane fuliginous ; lateral margins of the tergum paler fus- 



