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. Thorax broader at base than apex ; bind tarsi nearly as broadly dilated 

 as those in front. 



6. Larger, length 8 or more mm. ; middle and hind tibise of males sud- 

 denly broader at apical half. 1250. obtusus. 

 1)1). Smaller, length not over 7 mm. ; middle and hind tibiae not different 

 in the sexes. 



c. Body wholly black beneath. 1251. qtjadrig uttatus. 



cc. Abdomen and metasternum red. 1252. sanguinolentus. 



aa. Thorax narrower at base; hind tarsi slender; elytra with large dull 

 yellowish space enclosing black spots. 1253. confluentus. 



1250 (3755). IPs obtusus Say, Bost. Journ. Nat. Hist, I, 1S35, 15S ; ibid. 

 II, 644. 



Oblong-oval, subconvex. Piceous 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. 



Yigo and Floyd counties; rare. May 3-September 29. Occurs 

 in the middle and southern Atlantic States. 



*1251 (3756). Ips quadriguttatus 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 sparsely 

 punctured. Tips of male elytra oblique; those 

 of female rounded. Length 4-7 mm. (Fig. 243.) 



Throughout the State ; common. Hiber- 

 nates beneath logs, chips, etc. Hundreds 

 sometimes accumulate in a small space at 

 sap of oak or maple. February 14-Sep- Fig - 24: " x7 ' (After Forbes ° 

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

 priority. 



1252 (3757). Ips sanguinolentus Oliv., Ent.. II. 1791, S. 



Oblong-oval. 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. Yigo. Putnam. Crawford and Posey counties; scarce. 

 March 20-September 22. Taken at sap and on decaying fleshy 

 fungi. 



