_'04 



FAMILY' [\. 



-DYTISCIIl.l 



389 (1231). 



Fig. 103. X 4. 

 (After Wickham.) 



Cnemidoti s 12-pi :<cT.\Trs Say, Trans. Amer. Phil. Soc, II, 



182.3. 106; ibid. II, 518. 



Ovate, very cduvex. Dull yellow, each elytron with six 

 well defined black spots arranged as in the accompanyini; 

 figure. Head finely, thorax rather e<iarsely and sparsely, 

 punctate. Elytra each with eight rows ot: large black punc- 

 tures and two rows of finer, paler ones on sides. Hind coxal 

 plates subangulate on hind margin. Length 3.5-A. (Fig. 

 103.) 



Xorthern half of Sta.te, common ; less so in the south- 

 ern eoniities. Often taken in numbers when .seining. 



:\rav 



AtfO'u.st 1-5. 



300 (12.33). Ckemidotus EDENTrLUs Lee. New sp. X. A. Col., I, 1803. 21. 



Slightly more elongate and less convex than 12-inin-otatiis. Pale straw 

 yellow. Elytra more attenuate behind the middle and with spots larger, 

 often more or less confluent. Length 4 mm. 



Lake, Laporte, ilarehall and Fountain counties ; scarce. April 

 20-August 1.5. 



391 (12321. CxEMiDOTUS MUTicus LeC, New Sp. X. Am. Col., I, 1863, 21. 



Resembles 12-punctatus in form and sculpture. Differs by having the 

 hind femora wholly piceous or dark brown, the hind coxal plates broadly 

 rounded, and the elytra subtruncate at apex. The sutural Mack line is 

 narrowed on basal half and the median subsutural spot is confluent with it 

 to form a rather large irregular blotch. I^ength 3..>-4 mm. 



Throughout the State; common. IMarch 14-()ctober "23. This 

 as well as the other species probably i^asses the winter as imago. 



302 ( ). C>'EMiDOTUs PEDrKcrL.\Trs Roberts JIS. 



\"ery close to the preceding. Differs mainly in the arrangement of the 

 elytral spots as mentioned in key. The sutural black line is wider,' cwcupy- 

 ing the sutural interval on the basal half, and is not confluent with the 

 median spot. The elytra are feebly sinuate rather than subtruncate at 

 apex. Length 3 -3..j mm. 



Laporte, Mai'shall. Fountain. iEaviou and Lawrence counties; 



scarce, ^lav ll-Octolier 2.1. 



Family IV. DYTISCID^,. 

 The PRED.\f'ROT-s Divixc Reeti.es. 



In the quiet, deep pools of streams, and in ponds or stagnant 

 water may offon W s;m"ii dval. flattened liectlcs haiiiiing boad down- 

 ward, with the lip of the abdoiiKMi at or sliolitly abo\(.' the surface 

 of the water. These beetles beloiio lo the family Dyliscidai'. the 



