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ACANTHOSOMA HtEMORRHOIDALIS. 



Order Hemiptera. Fam. Pentatomidse. 



Ty^e of the Genus, Cimex hasmorrhoidalis Linn. 



AcANTHosoMA Cuvt., DeLop., Burm. ^-Clinocons Hahn. — Pentato- 

 ma Lat. — Cimex Linn., Fab., Wolff. 



Antenna inserted a little under the margin of the clypeus, be- 

 fore the eyes, rather long, filiform, pubescent and 5 -jointed, 

 basal joint long, stoutish and clavate, 2nd nearly as long but 

 more slender, 3rd the shortest, 4th as long as the 1st, 5th 

 scarcely so long (4). 



Labrum long, attenuated, transversely striated, received into a 

 canal in the basal joint of the rostrum (3 and 3 a). 

 Mandibles and maxillce setiform. 



Labium inflected, extending to the hinder pair of coxse, slightly 

 pubescent, 4-jointed, basal joint the stoutest, shorter than the 

 head, 2nd and 3rd longer and equal, 4th a little longer than 

 the 1st (2). 

 Head trigonate, flat, immersed to the eyes, which are small and very 

 prominent : ocelli 2, placed near the base, but remote. Thorax 

 transverse, each side produced into a trigonate spine, anterior mar- 

 gin very narrow, hinder broader, both concave : sternum keeled 

 forming a large incurved spine (5 a). Abdomen depressed oblong, 

 attenuated, truncated ; slightly keeled beneath, and terminating in a 

 long spine at the base, which lies over or by the side of the pectoral 

 one (b). Scutel large and trigonate, the apex acuminated. Elytra 

 ample, coriaceous, apex membranous with several obscure longitudi- 

 nal nervures : wings large, with a few strong nervures. Legs mo- 

 derate, hinder a little the longest : thighs simple : tibiae, anterior 

 faintly notched internally (6) .- tarsi short, biarticulate, 2nd joint 

 the longest, clavate : claws curved, acute : pulvilli divaricating. 



H^MORRHOiDALis Liuu. — Curt. Guide, Gen. 1131. 1. 



Ochreous-green, with irregular black punctures : angles of 

 thorax rosy orange or black, and a transverse band near the 

 anterior margin orange or rosy ; apex of scute! yellow : abdo- 

 men black and scarlet above, margins and underside ochreous : 

 membrane and wings pale fuscous-ferruginous : antennae black, 

 testaceous at the base : legs green, ochreous or rosy : tips of 

 tarsi, claws and rostrum piceous. 



In the Author's and other Cabinets. 



Nothing probably has contributed more in this country to 

 the elucidation of neglected tribes of insects, than the miscel- 

 laneous form in which this work has been published, by which 

 means the attention of the student has been invited to the in- 

 vestigation of every order, and even the Lepidopterist was 

 often induced to extend his researches beyond the beautiful 

 objects to which he was devoted. 



In May 1824- I found on studying Pentatoma that it was 



656 



