''<'- FAiMII.N' XW. -IIIS'l'KKID.i:. 



e. Til)i;H nil dihitcd, (he I'l'ont (Uics with l;u-v;(' fcniiiii.il spiii-s. 



VI. DicNDKoriiiii s. 

 cc. Middle and hind lihi.-e slender. 



f. Front tibiu' diliited. with large terminal spnr. VII. Paromalus. 

 if. Front tihiie feebly dilated, with small spur. Anapleus. 



TI. liisTKR Lititi. 17()."). I L.. '•;! clown Of mimip.") 



A vei-y ];n\u-<' ^ciius. (•oini)risiiiu' Mhout S4 of the known North 

 Ainericnn species. ]\[aiiy of them are nominal only, being sepa- 

 rated by chai-acter.s which are varial)le or unstable, such as the 

 letigth of the outer thoracic stria and the length and eonnection of 

 eertain of the elytral stria?. Since these stria? are so much used in 

 the separation of species in almost all of the scMiera, the following 

 brief description of them is given : 



x\ear each side margin of the th(»ra.\; there are usually two 

 .striae known as the "outer and inner thoracic striie. " The first of 

 these is often very short or wholly w'anting and in the same species 

 is often varial)'e in length. The stria? of each elytron are normally 

 nine in number, but several of them are more or less abbreviated, 

 so that the number apparent is much less. Six of these, when 

 pi-esent. are foinid on the disk. and. l)eginning near the margin, 

 are called "first dorsal." "second dorsal," etc.; the sixth one. 

 nearest the suture, being known as the "sutural." The fourth, 

 fifth and sixth are often very much abbreviated. On the margin of 

 tln^ elytron, outside of the first dorsal, there may be three other 

 sti-i.e known as the "inner, oiitcf and oi)lic|ue subhumerals, " or if 

 oidy on(^ lie ])resent. as the "siihhnmei-al. " The two dorsal seg- 

 ments left exposed by the jiaincale elytra are known as the "pro- 

 pygidium" and the " |)ygi(linm."" and the character of their punc- 

 tuation is also often used in the sej)ai'alion of species, 'i'o obviate 

 the necessity of a viM-y long key. the species of the genus Hisfcr 

 liave l)(?en divided into six or seven grou])s or subgeiu^'a. four of 

 wliich are represented in Indiana. 



KKY TO INDIANA SUnfiKNKR.V OF HISTKR. 



(I. I'^ront liliia' witli llic tarsal LCi'oove badly delined. straitiht: middle and 

 hind tibia' with small sjiines. 

 h. Mesosternnni trnneate or emar,i,'in;i(e al apex; iinier thoracic stria 

 always in'csenl. usnally cnlii'e. Siibf,'enns I. IIistjir. 



hh. Mesoslcinnni nmrc or less produce(j in Iron! ; irnier thoracic stria en- 

 tirely absenl. Snbii-enns II. I'hki.istkk. 

 '/((. I'mni libia> with the l.us.il uiiK.ve well delined; middle and hind tiliia' 

 snbdenlale: inner t liiirari<- si ria absent. 

 c. FronI tibia- withoni a ludth u\i the inner side near the base; siiine of 

 lir<istei-nnni H.-illened :i( ai)ex. Subiienns 111. Tlatysoma. 



