160 HEMIPTERA. 



plates triangular, the basal and outer ones about equal, the two 

 intermediate smaller. Legs testaceous ; thighs covered with large 

 brown dots and with a pitchy brown ring near the apex ; tibiae 

 covered with smaller dots, and with a broad dark brown band 

 near the base. Rostrum testaceous, very long, reaching nearly 

 to the posterior margin of the penultimate segment ; first joint 

 thickest, inserted near the base of the head, reaching the anterior 

 coxae ; second longest, nearly reaching the posterior coxae ; 

 third shorter than the second, but longer than the first; fourth 

 joint about equal to the first. Antennae black, five-jointed; 

 basal joint thickest; second and third subcompressed, slightly 

 furrowed longitudinally; second thicker than the third, about 

 equal in length to the first; third and fourth about equal in 

 length, longer than the second; fourth joint cylindrical; fifth 

 wanting. 



a. . From Mr. Sowerby's Collection. 



Genus 6. CORIPLATUS. 



Coriplatus, White, Ent. Trans, iii. 90 (1842). 

 Sachana, Am. $ Serv. Hem. 116 (1843). 



1. CORIPLATUS depressus. 



Coriplatus depressus, White, Ent. Trans, iii. 90. pi. 7. fig. 3(1842). 

 Sachana depressa, Am. fy Serv. Hem. 116. 1 (1843). 

 a. Demerara. 



Genus 7- ALATHETUS, n. g. 



Head produced anteriorly, the lateral lobes longer than the 

 central, the apex strongly emarginate ; lateral margins scarcely 

 spinous before the eyes. Ocelli small, distant. Antenniferous 

 tubercles slightly spinous exteriorly. Antennae nearly as long as 

 the body, four-jointed ; basal joint shortest and thickest, reach- 

 ing beyond the anterior margin of the head ; second joint as long 

 as the third and fourth together ; third and fourth joints about 

 equal in length, thinner than the second. Rostrum long, reach- 

 ing the centre of the abdomen, arising from the middle of the 

 head ; basal joint shortest, reaching beyond the base of the head, 

 but not attaining the anterior coxae ; second joint longest, pass- 

 ing the intermediate coxae ; third joint longer than the fourth, 

 which is the thinnest. Rostral canal with very high margins. 

 Body broadly ovate, depressed, widest behind. Thorax trans- 

 verse ; the anterior margin much wider than the base of the head, 

 narrowly emarginate in the centre for the reception of the head ; 

 anterior and lateral angles prominent, especially the former; 

 lateral margins emarginate, forming a segment of a circle. Scu- 



