Till' T.AMFT.i.icoitx i!i:i:'ri.i' s. 995 



Tribe 111. CETOXllNI. 



In addition to tlic llattened form and i)i'oinincnt conical front 

 coxa', tiio nienibers of this ti-ibc have the antiiiina^ always lO-.jointcd ; 

 scutelluni usually trianiiular and [xnntcd; |)\-^idiuiii visible and 

 tarsal cLnvs (>(|ual and simple. In some ucntM-a the side pieces or 

 (>pimera of the mesothorax are contiinicil upward so as to form a 

 little piece whieli is easily seen at the sliouhlers between tlu^ thoi'ax 

 and elytra. In flyin-^-. the true Cetonia' do not raise the elytra, as 

 most beetles do, but the imier wings i)ass out from the side under 

 the elytra, which are a little narrower at the tips than the base and 

 do not at all embrace the sides of the l)ody. The members of this 

 tribe difl'er from the other "leaf chafers" in being- for the most 

 part flower lieetles, the mouth organs being furnished with a brush 

 of hairs with which tiiey collect the pollen. They are therefore 

 mostly diurnal, ilying about from flower to flower during the heat 

 of the day. At night and in cloudy or rainy weatluu- they are to be 

 found beneath bark or other cover. Seven of the nine genera com- 

 prising the tribe in North America are represented in the State. 



The following literature treats of three of these, the descriptions 

 of the species of the others being widely scattered : 



Tforn. — "Synopsis of the Euphoriie of the United States," in 



Proc. Amer. Phil. Soc, XVITI, 1880, 397-408. 

 Uorn. — "Descriptions of New Coleoptera of the United States, 

 Avith Notes on Known Species," in Trans. Amer. Ent. Soc, 

 III, 1871. The genus CrcmasiochiJui> is treated on pp. 

 339-341. 

 Horn. — "A I\ronogra]>hic Revision of the Species of Crcmnafo- 

 chilus of the United States," in Proc. Amer. Phil. Soc, 

 XVIII, 1880, 382-397. 

 Horn. — "Revision of the United States Species of Ochodieus 

 and other Genera of Scaralia-ichr, " i» Trans. Amer. Ent. 

 Soc, V, ISTT). The genus Trirliliis; is monographed on pp. 

 194-197. 



KEY TO INDIANA GENF.RA OF CETONIINI. 



(I. Side pieces or eiiiinci-a of tlie inesotliorax visible from above; elytra 

 more or less siiiuale on tlie si(l(>s beliiiid llie bumeri. 

 /(. 'I'liorax lobetl ;U Uie base, tbe lobe covering tlio scutellum; head of 

 I>oth sexes w itli a more or less distinct frontal and clypeal splue. 



XXXVI. C'OTINIS. 



hi). Scntellnm not covcM'cd l»y ;i lobe of tbe thorax. 



