PENTATOMIN.E. 109 



Subfamily V. PENTATOMIN^. 



Pentatomida, Stdl, Hem. Afr. i, p. 32 (1864) ; id. En. Hem. \, p. 28 

 (1876), part. 



The Pentatominse agree with the remaining subfamihes of the 

 Pentatomidae in having a somewhat common taeies, and are thus 

 easily recognized. The fundamental structural characters of this 

 subfamily are the following: — The primary and subtended veins 

 of the hemelytra are generally found close together and more or 

 less parallel to each other, but diverging at the apex ; hamiis 

 usually absent ; scutellum variable in size. With the exception oT: 

 the subfamily Tessaratomiuge the remaining Pentatomida^ have the 

 spiracles of the basal ventral segment hidden by the posterior area 

 of the metasternum, and excluding the Acanthosomalinse have the 

 tarsi of three joints. In conjunction with the following subfamily 

 (Asopinae) the rostrum is of variable length, but extending beyond 

 the anterior coxae, the basal joint distinct and seldom shorter than 

 the bucculae. 



The rostrum in the Pentatominae is slender, more or less remote 

 from the labrum, which is inserted belo\\' the apex of the central 

 lobe to the head ; bucculte parallel, not united posteriorly. 



In the divisional arrangements of genera, I have in some cases 

 differed from the views of Stal, which have hitherto been generally 

 followed. 



Division HALYAlilA. 



This division corresponds to Dallas's family Halydida? (List 

 Hem. i, p. 150, 1851). 



Abdomen beneath with a more or less distinct longitudinal 

 sulcation ; head long ; rostrum extending beyond the posterior 

 coxae ; antennae of from three to five joints, remote from the eyes ; 

 third joint of the rostrum much longer than the fourth ; eyes yery 

 prominent. 



Si/nopsis of Genera. 



A. Anterior and posterior tibiae dilated Erthesina, p. 117. 



B. Posterior tihitB simple, anterior tibiae some- 



times dilated. 

 a. Central lobe of head usually as long as 

 hiteral lobes or longer. 



a. Head elongated, tapering in front. 



a'. Head longer than the prouotum . . Halys, p. 119. 

 b'. Head about same length as pro- 

 uotum ^GiEUS, p. 120. 



b. Head rounded or truncated at the apex. 

 a . Lateral margins of head tootlied 



near apex '..... Dali'ada, p. 109. 



