12SS FAMILY I.VIIl. — MELANDRYtD.K. 



KEY TO INDIANA GENERA OF TETRATOMINI. 



a. Antenniil club composed of four .loints. 



h. Mar.!;iiis of thorax not rrflexed at sides ; larger, VjA\ nun. 



I. Tetuatoma. 

 hh. Margins of thorax rather l)roadly coueave and reflexed, the edge un- 

 evenly CTenulate; length less than 4 nun. 

 c. Basal segnieni of alidoinen as long .-is tlie next two cniiilihied ; eoliir 

 above mottled, l)laek and pale. II. .\iisrnui,iA. 



re. I'.as.il segment "t abdomen lint little longer than secdnd ; color 

 aliDve blackish, not mottled l)nt elylr.a with an indetinite. oblicine 

 yellowish streak. Incolia. 



(HI. Autennal elnb eemposed of three .iuinls; eyes smaller, vei'y short and 

 strongly ti'ansverse; length alien!' .'! nun. III. 1'iseni ,s. 



I, T -iTRATOMA Fah. 1790. (Gr., "i'our + joints.") 



This genus, as limited by Casey, eontains two species, one of 

 which occurs in the State. 



L';iSl (7(i4(i). Tn-IIiATOMA TKUNCOIUM Lcc. Xcw Sjl. X. A. Cell.. I, IMIC, 14."). 



Elongate-iival, strongly convex. Thorax, legs and under sortace red- 

 dish-yellow: head and antenna' black; elytra steel bine. Antenna' two 

 fifths as long as body, the cinb as long as the basal portion. Thorax tAve- 

 tliirds wider than long, sides rounded from base to apex, hind angles ob- 

 tuse; surface sparsely, deeply and rather coarsely iiunct.ate, the basal im- 

 pressions small, deep, rounded. Elytra jiarallel to apical third, thence 

 rounded to ajiex; surface sjiarsely, irregularly and deeply punctate. Length 

 4.ri~(; mm. 



Southern half of State; scarce. March (i-Dccemher 21. Occurs 

 in dry fungi and beneath bark of funon.s-eovcred logs, more espe- 

 cially those of beech. 



II. Abstrulia (^asey. 1900. 



Small oblong-oval species having the margins of thorax wider 

 and more reflexed, its basal fovea; larger, deep and less punctiforra 

 than in Teiralmna: scutellum smaller and more (piadrate; elytra 

 mottled instead of unicolorous as there; surface sparsely but dis- 

 tinctly pul)escent. Three nominal species are recognized by Casey. 

 One of these is in the eolh'ction at hand, while another he described 

 from the State. 



KEY TO INDIANA SPfX'UOS l)V ABSTIUI.IA. 



<i. Basal joint of hind tarsi very much sherter than last .ioint ; yellow of 



elytra greater in extent than tlie black. :i:',.s2. tksskei.ata, 



nil. Basal joint scarcely shorter than the last ; blai-k uf elytra much greater 



in extent than the yellow. MAcrrATA. 



