544 FAMILY XVIIl. — EKOTVlJO-i:. 



(1. Last JDiiit of palpi widely haldiet-shapoa : thorax yellow with four 



lilack spots; length 7 s mm. V. IscnYRt's. 



(/(/. Last .1oint of palpi oval or slightly triangular; thorax yellow or hlack. 



rarely with two spots ; length less than 6 mm. 



e. Middle area of mentum large, transverse. VI. Mycotretis. 



cc. Middle area of mentum small, triangular. VII. Tritoma. 



TI. Plceofo^fa Woll. 1854. 



This o-omis is representod in the eastern Ihiited States and In- 

 diana 1)\- a .sinde very small brown species. 



lO."!! (.'',212). Pr.(EOS<).\i.\ rrxcTATA T-ec. 'Prans. Amer. Ent. Soe.. V, LSI.".. 

 171. 

 Oval, rather strongly convex. T'oilorm dark chestiuit-hrown ; antenna' 

 and legs paler. Thorax twice as wide as long, finely and sparsely punctate. 

 Elytra distinctly but iMtiier sjtarsely and irregularly punctate, and nar- 

 rowed to a rounded ajxw. Length 2 2.."( nnn. 



Sonthern two-tliirds of State: coniuion. Hiliernates. April 9- 

 Deceniliei- :>. Oreoarions in winter and early spring beneath havk. 

 especially tliat of elm and willow. 



TTT. Dacn'k l.atr. ITOG. ((Jr.. "bite or stiii^.") 



This <i('iins is rcni-escnicd in llic Tnited States by three small 

 species, one of which oci urs in Tiidiaiia. 



lo:;s (:;2i:;). ])a( nk 4-.MA('eLA'iA Say. r.ost. .lonrn. Nat. Hist.. 1. is;;.-,. W,'.) : 

 ihid. 11. (M.^). 

 (>l>l<)iig. parallel. I'.lack: elytra e:ich with a iMund reddish-yelhiw spot 

 (in humerus and another at apex: lieneatli ])iceous or dark reddish-brown, 

 the antenna', legs and clypeus jialer. Head and thorax closely but sparsely 

 l>imctatc: elytra with numei'uus inws of fine punctures. Length 2.r)-P,.2 nun. 



Thronti'hont the State. fre(|nent in the sonthern counties; less so 

 iioi'thward. A])ril T5-Septeiriber 21. Occurs in fungi. 



TV. ]\lF.'iALonACNE Crolch. IS?:'.. (Gr., "large + bite.") 



IIci-c Ix'long the lariicst species nf 111" family, handsome black 

 and yellow forms, having llie fourth .joint of tarsi smaller but dis- 

 litK 1 : last joint of pal|>i snbcylindrical and the mentum triangular. 

 Three species are known from the I'liited States, all of which occttr 

 in Indiana. 



I<I:Y 'ID INDIANA Sl']"( li:S Ol' MK(iAr,OnAfNK. 



a. lOlylra wilhniil rows of puin-l ures ; length IS 21 nun. 1040. iii:i!os. 



««. Elylra. witii rows of line ]iunctures. 



