HEMIPTEBA HETEROPTEBA PENTATOMID.E. 447 



This is tlie commonest fossil cydnid known in tin- " Amvzon shales." 



Length. l.-'f)-r>.l mm ; lin-:ultli, 2.2-3.1""". 



Florissant. Twenty-nine specimens, of which some nt' tin- IH-.M are 



Nos L919, 2100, 4.-.U5. 4663. 1851, 754."., 9:.x;;, 1 r_"_>ii, r_'m;s, L2987, 1 1221, 



<i. NECROCVUM s SKMOR. 

 Head well rounded, transversely ovate, nearly a third as liroad a- the 



thorax, half as broad again as lon^-. Thorax only twice as broad as the 

 median length, taperin- but little, the lateral angles ot' the front prominent, 

 the apical emargination considerably and tolerably deep, the surface appar- 



cntly finelv punctate, with two posteriorly con vermin;;- shallow and taint 

 sulcations crossing the disk longitudinally from the outer edi;e> of' the eyes 

 liackwanl. Sciitellnni moderate, more than halt' as liroad as the thorax, 

 broader than Ion-, reaching less than halt'-way to the tip of the abdomen. 

 Ilemelvtra with the corium punctate in serial rows, reaching the middle \ 

 the antepenultimate segmenl of the abdomen. Tibia' lieavilv spim-d. Ab- 

 domen full and rounded, hardly so loii- as broad. Color blackish brown, 

 the hemelytra with the corium dark testaceous, the membrane dear. 



Leiif-'tli. I""": breadth, 2.5 mnl . 



Florissant. Four specimens, Nos. 27:52, lir.Ci;, 11793, 13155. 



7. NECROCYDNUS SOLIDATI >. 

 I'i. LS, Fi-. 13. 



A -tout Aperies, fuller in front than behind. Head transversely ovate. 

 about twice as broad as lon- and about one-third as broad as the thorax. 

 Thorax hardly twice as broad as the median length, tapering hut very little. 

 tin- lateral angles nf front very prominent, the apical emargination very broad 

 and only moderately deep ; surface even and distantly punctate. Sciltelluni 

 similarly jiunrtate, about two-thirds as broad as the thorax, broader than 

 IOHL:', the angular apex not reaching half-way to the tip of the abdomen 

 I lemelvtra with the corium apparent!} reaching the penultimate abdominal 

 -.-inent. Tibia' very heavily and coarsely spined. Abdomen siiliconical. 

 pointed. 



Length. 5.6 1 ..... : breadth. 3 mln . 

 Flnris.s;int. Two specimens. Nos. il'.KIT, 



