■i"iTi'] siioin'-\vi\'(!i:i) s('.\vi:\(ii:i; i!i;k'I'i;i:s. 421 



XIA'. l.\riiKMi;ir.\i (li-jiv. ISOil. ((Jr.. "liiddcii i life") 



.Mcdiiini (!!■ siniill sized St;i|»liyliiii(is liiiviiiu' the pt'dslcniiiiii 

 shorli'iicd ;iii(l jiculc hchvi'iMi the i'l'oiit coxa'; IVoiit tarsi strongly di- 

 lated and densely ;'l(»llicd l)cne;dli with l;!i-<ic wliitisli pads composed 

 of t1att(Mied hail's : I'dtii'th jniiil dI' ina\illar\- palpi eoiucal and 

 l)oiiitt'd or iie(Hlle-sliai)ed. 



Casey, in lii-; ''Ixevision. " has divided llie old liciius Ldl limhiii in 

 as recojiiii/ed i)y LeCoide, Horn and other authorities, into ID 

 s^enera. ten or eU'ven of which ai-e jtrohahly represented in Indiana. 

 His distinuuishinii' charactei's aic. in many instances, of minor im- 

 p(n'tanee and I pi'td'er to i'aid< his (genera as i>'ronps or subgenera, 

 thus placing all species under the welKknown name of Lathrohium. 

 The following- is a nnsdili* atioii of the key or table of genera as pro- 

 posed by Casey: 



KrV lO INDIANA OltOl I'S OK SlliC KN'KliA OF 1 AllllIOUIl M . 



ti. lllyti'.i willidul a I'old or rnised lino on tlio delicxcd iioiiion. 

 h. .Ncclc iiroiid. IimH". or iiioi-c tluin linit" tlio widlli of liciid. 



<: Hind tarsi l(r,i,m>i' and mure slender, the ))nsal Joint nnicii sliorler 



tlian second, tlie fifth miiCli shorter tlian tlie first t'onr ennil)incd. 



'/. i;i.vtra very sliort. from one-half to two-thirds tlie lenj^tJi of 



tliorax. their has-al anj^les obsolete; inner wiiii^s wantiiiii; al)- 



domen rather coarsely and sparsely punctafe. 



Group A. Aptkrai.ium. 

 'hi. lOlytra varyin.^c in lcn,L;tii from a little shorter to decidedly longer 

 than thorax, basal angles distinct: inner wings present; abdo- 

 men minutely punctate. Group B. Latiirobium. 

 re. Hind tarsi shorter and stouter, the first and second joints sub- 

 equal, the first four differing but little among themselves and 

 together often Imt little longer than fifth; gular sntyrcs i)arallel 

 and curved. I'ather widely sejiai-ated. nearest together near the 

 middle of the surface behind the mouth. 



Group C. Latiirorioma. 

 bh. Neck narrow, about one-third as wide as head; gular sutures nearly 

 straight, feebly converging liehind. nearest together near the base 

 of the head. (Jroup D. TETARiorKis. 



ail. Elytra with a longitudimd fold or raised line on the dellexed ixirtion. 

 the line parallel with the side margin, 

 c. First joint of hind tarsi ecpial to or slightly longer than second. 

 f. Four basal joints of hind tarsi subecpial ; front tarsi feebly di- 

 lated ; gular sutui'os very widely se])araled, being sei)arated at 

 base i)y one-lhird tlie width of head: hody very small and sleu- 

 der. not over 1 mm. in length. (Iroup E. P.SErnoLATHBA. 



ff. First and scccml joints of hind tarsi each longer than the third or 

 fourth. 



