March, igoi.] Caudell : The Genus Sinea OF Aa/vot 6-^ Serville. 3 



r Margins of the female abdomen prominently undulate, the undulations usually 

 sub-angulate. Male abdomen varying from almost entire to quite 



prominently undulate. Length, 12-I4 mm diadema Fab. 



5. \ Margins of the female abdomen usually inconspicuously undulate, sometimes 



more pronounced but rarely so prominent as in diadema ; the undulations 



generally rounded. Abdomen of the male entire, or very slightly un- 



j dulate. Length, Il-I3mm COnfusa, sp. nov. 



f A pale fascia at the lateral extremity of each abdominal segment. Membrane 

 of the hemelytra with a longitudinal dusky mark extending to the apex. 

 Anteocular spines generally short and somewhat blunt rileyi Mont. 



I The lateral extremity of the fourth abdominal segment without a pale fascia. 



I Membrane of the hemelytra generally without a longitudinal dusky mark 



I extending to the apex. Anteocular spines variable 7 



f Anteocular spines sharp and well defined, the pair next the eyes usually longer 



than the terminal pair 8 



1 • \ 



Anteocular spines blunt, short, usually mere tubercles, the pair next the eyes 



I not distinctly longer than the terminal pair defecta Stal. 



fDisk of the posterior prothoracic lobe bigibbous. Lateral margins of the ab- 

 domen, especially of the female, undulate, scarcely so in the males 9 



I Disk of the posterior prothoracic lobe transversely convex, not distinctly bigib- 

 I bous. Lateral margins of the abdomen not undulate in either sex lo 



("Abdomen of both sexes abruptly widened behind COronata Stal. 



\ Abdomen of neither sex abruptly widened behind COnfusa, var. 



{Abdomen of the male emarginate at the apex, subcaudate, margins sub- 

 parallel caudata Chantp. 

 Abdomen of the male sub-truncate at the apex, not caudate Ii 



f Abdomen of the male with the margins sub-parallel, of the female widened to 



I the apex of the fourth segment raptoria Stal. 



■ j Abdomen of both sexes directly widened to the apex of the fourth segment, 



but narrower in the male than in the female 12 



Abdominal segment four and the basal half of segments five and six generally 

 of the same color as the rest of the abdomen above, or slightly darker. 

 First pair of anteocular spines usually twice as long as the terminal pair. 



Usually less than 12 mm. in length sanguisuga Stal. 



Abdominal segment four and the basal half of segments five and six generally 

 much darker than the rest of the abdomen. First pair of anteocular spines 

 longer than the terminal pair, but seldom twice as long. Usually more 

 than 12 mm. in length spinipes Stal. 



Sinea diadema Fabr. 



(Plate L Fig. i, and Plate H, Figs. 3, 4, 5, 6.) 

 Cimex iniiltispinosHS DeGeer, Mem., Ill, 1773, p. 348 (pars). 

 Reduinus diadema Fabricius, Gen., 1776, p. 302; *Spec., II, 1781, p. 382; Ins. 

 Mant., II, 1787, p. 313; Ent. Syst., IV, 1794, p. 206. 



I 



