THE SAP-FEEDING BEETLES. 649 



and among them are one or two of the most common and best known 

 species of the family. Six species are listed from the United States, 

 four of which occur in Indiana. 



KEY TO INDIANA SPECIES OF IPS. 



a. Thoi-ax broader at base than apex; hind. tarsi nearly as broadly dilated 

 as those in front. 

 6. Larger, length S or more mm. ; middle and hind tibife of males sud- 

 denly broader at apical half. 1250. obtusls. 

 66. Smaller, length not o\er 7 mm. ; middle and hind tibite not different 

 in the sexes, 

 e. Body wholly black beneath. 12.51. quadeiguttatus. 

 cc: Abdomen and met j sternum red. 12.52. saxguinolentus. 

 aa. Thorax narrower at base; hind tarsi slender; elyti'a with large dull 

 yellowish space enclosing black spots. 12.53. coxfluentus. 



1250 (3755). IPS oettsis Say. Bost. Journ. Xat. Hist., I, 1835, 158; ibid. 

 II, &44. 

 Oblong-oval, subconvex. Piceons black, shining ; elytra each with two 

 rounded, reddish-yellow spots, one at middle of base, the other slightly be- 

 hind the middle. Entire upper surface rather finely and regularly punc- 

 tured. Tips of elytra slightly oblique in both sexes. Length 8-12 mm. 



Vigo and Floyd counties ; rare. iMay 3-Septemb.er 29. Occurs 

 in the middle anci southern Atlantic States. 



*1251 (3756). IPS QUADEiGUTTATUs Fab., Syst. Eleut, II, 1801, •580. 



Oblong-oval, subconvex. Black or piceous. 

 shining ; elytra usually with broad, irregular yel- 

 lowish humeral spot and another smaller one be- 

 hind the middle, these often reduced and vary- 

 ing much in size, becoming at times mere yel- 

 low points. Upper surface finely and sparsel.\- 

 punctured. Tips of male elytra oblique; those 

 of female rounded. Length i-7 mm. (Fig. 243.) 



Throughout the State ; common. Hiber- 

 nates beneath logs, chips, etc. Hundreds 

 sometimes accumulate in a small spac(^ at 

 sap of oak or maple. February IJ— Sep- 

 tember 22. Listed as I. fasciatus but the name here given has 

 priority. 



1252 (3757). Ips sangtjixolextvs Oliv., Ent., II, 1791, 8. 



Oblong-o\al. Black, shining; elytra in great part bright red; the tip, 

 a small humeral and larger round discal spot black ; abdomen red. Tips 

 of elytra of the two sexes as in the preceding. Length 4.5-5.5 mm. 



Lake, Vigo, Putnam, Crawford and Posey counties; scarce. 

 ]\rarch 2(1-September 22. Taken at sap and on decaying fleshy 

 fungi. 



Fig. 243, 



