048 i-WMiiiV xxvf. — NiTrnuTiiD.T;. 



Tribe VI. IPINI. 



]\Iediuin-sized species having the lahnuii firmly united with the 

 front of head, the suture more or less distinct; antennae 11-jointed, 

 club 3- jointed. Three genera compose the tribe, two of which are 

 represented in Indiana. 



KKY TO INDIANA fiENERA OF IPINI. 



(I. I'.ddy pulK'scciit ; tIior;i.\ iiiai'i,nnt'(l ;it I);isi', sliylitly overliiiijiing base of 



elytra. XX. Ckyptakciia. 



aa. Pxidy s^labrous ; tborax iiof inar,u.iiie(l at l)ase. XXI. Ips. 



XX. Cryptarcha Shuck. 1839. (Gr., "hidden + anus.") 



Oval, piteous or reddish-brown species having the labrum in- 

 distinct ; prosternum prolonged and plate-like at tip, partly con- 

 cealing the mesosternum. Two species are known from the State. 



KEY TO INDIANA SPECIES OF CRYPTARCHA. 



(/. I'nnctiires of elytra in ill-defiiied rows; lenjftb 6-7 mm. 1248. ampla. 

 (/(/. I'unctures of elytra all confused; lenjitb less than 4 mm.; sides of tho- 

 rax flattened, those of elytra rallier widely retlexed. 



1249. CONCINNA. 



1248 (37.^j2). CiiYPTAUcnA ampla Ericlis., (Jerm. Zeitsch., IV, 1843, 850. 

 Oval, nioi'e obtuse in front. Uniform pieeous or dark reddish-brown. 



sparsely pubescent. Thorax feebly emaryinate and but little narrowed in 

 front, margin not flattened, narrowly retlexed, hind angles obtuse; surface 

 rather closely punctate. Elytra gradually narrowing behind, margin nar- 

 rowly retlexed, the tips separately rounded. Length (j-7 nun. 



Lake, Marion and Vigo counties; scarce. June 13-September 

 28. Taken in Vigo bnt once, when a number were found at sap of 

 soft maple in a swamp. 



1249 (3754). Cryptarcha (joncinna Mels., Catalogue, 1800, 41. 



Oval. Pieeous. moderately shining, si)arsely pubescent; margin of tho- 

 rax, two narrow transverse, sinuous bands and a scutellar spot on elytra, 

 dull yellow. Thorax nearly twice as wide .ns buig. sides gradually curved, 

 hind angles rectangular ; surface, as well as that of elytra, sparsely punc- 

 tate and witli short, erect, stiff hairs, th(jse on elytra in seven rows. Length 

 2.5-3 mm. 



Marion and Putnam c(mnti(>s; i-are. Mai-ch 20-April 22. Taken 

 by sifting; also occurs at sa]). 



XXT. Trs Fab. 1770. (ilv.. "a worm that cats horn and wood.") 



Smooth, shining ])lack beetles, having the elytra marked with 

 I'cddish or yellowish spols. They occur at sap or in decayed fruits. 



