PLACOSTERXUM. 211 



•341. Placosteniiim dama, Fahr. (Cimex) E)if. Syst. iv, p. 92 (1794) ; 

 id. (Edessa) Si/st. Ithyng. p. 147 (1803) ; StaJ, Hem. Fabr. i, 

 p. 34 (1868). 



A species to be recognized by the more elongate body and the 

 much less produced pronotal angles, which are sinuate near the 

 anterior angle and then lobately rounded posteriorly ; the lateral 

 margins , are simply ci'enulate ; the anteunal joints are piceous 

 much speckled with ochraceous. 



Length IS to 20 ; breadth between pronotal angles 10 to 12 

 railHm. 



Hah. Pondicherrv {Sfocl-holm Mas.). Assam ; Dikrang (Atkinson 

 ■Coll). Cochin (d)lL Dht.) ; Trivandrum. 



o42. Placosternum obtusum, Montand. Ann. Soc. Ent. Behj. xxxviii. 

 p. 033 (1804). 



A species I have not seen, described by Montandon from a 

 female example and stated to differ from all the other species of 

 the genus by its relatively narrower shape, and by the pronotal 

 angles, which are very large but do not project so much as in the 

 other species ; they are bisinua.ted at their apices, the anterior 

 lobe only spined and the median lobe very largely rounded. 



Length 22 ; breadth betweeu pronotal angles 16| millim. 



Hah. Mysore. 



A species apparently allied to P. cervus, Dist. 



Division IIHYXCHOCOBAIUA. 



I use this name, employed already by Stal and Atkinson, in a 

 somewhat different signification to theirs. In the Bliyncliocoraria 

 as here pi'oposed, as in the last division, the abdomen is alwaj's 

 more or less distinctly spined at base, sometimes lougly so, in 

 other genera the protuberance is more of an angulated tubercle ; 

 the pronotal angles are always more or less strongly produced, but 

 tlie pronotal margins are entire and neither sen-ate nor dentate. 



Synopsis of Genera. 



A. Abdomen not furrowed. 



a. Basal iiiargiu of pronotuni concave. 



a. Abdoniiual basal spine or tubercle 



short. 



a . Mesosternal process extending be- 

 tween anterior coxse Rhyxchocoeis, p. 212. 



//. Mesosternal process extending 

 throughout greater length of 

 head Vitellus, p. 214. 



b. Abdominal basal spine very long. . . . Lkovitius, p. 215. 



b. Basal margin of pronotum straight .... Sab.ieus, p. 216. 



B. Abdomen witli a broad basal farrow . . .'. Ajiclycar\, p. 217 



p2 



