340 FAMILY Xr. — STAPHYIJXID.E. 



KEY TO INDIANA GENERA OF BOLITOCHARINI. 



a. Mesosternal process broadly truncate or emarginate behind; middle 

 coxfe widely separated ; labial palpi Avith two joints only. 



IV. Gykopii.ena. 

 (/(/. Mesustern;.! process more or less pointed lu'liiiid: middle coxa' moder- 

 ately separated or contiguous. 

 h. Labial palpi with two joints only. 



<: Ilind tarsi with the first joint at least as long as the second and 

 third together; t'rnut tarsi with the first joint distinctly longer 

 tlian the second; ligula very broad and short, very broadly 

 rounded in fr(.nt; labial palpi short, their first joint swollen. 



Placusa. 



cc. Hind tarsi witii the hrst joint not or only a little longer than the 



second ; front tarsi with the first three joints equally long ; ligula 



very narrow ; labial palpi with both joints more or less elongate. 



(I. Labial palpi moderately long, not bristle-like ; ligula moderately 



narrow, split at ti]) ; body depressed. Y. Homalota. 



(Id. Labial palpi very narrow, prominent, stiff, bristle-like; ligula 



very narrow, entire, more or less narrowed toward tip ; body 



rather convex. Siltsa. 



hh. Labial palpi with three joints. 



r. Ligula entire. 



/. Labial palpi with the second joint as long as and scarcely nar- 

 rower than the first. VI. Leptusa. 

 ff. Labial it.-ilpi with the sec(.nd joint longer and narrower than the 

 first; lliorax wider than elytra. VII. Philotermes. 

 ee. Ligula split, oi- bifid at ti]i. VIII. Bolitochar,v. 



IV. Gyroph.ena ]\laii!i]i. ls;5(». (Gr.. "a circle + to sho^v. ") 



Form short and liroad ; anteniuv ratlici' sl'.ort; ht^ad strongly 

 ti-ansverse; eyes i)roiiiirient : third jniiil of inaxillary palpi thick- 

 ened; thorax short, l)i-oad, distinctly niariiiiu'd; elytra large, abdo- 

 men short and broad; snrface smooth, shiniiio-. almost destitute of 

 hairs or imnclnres. '^Phe six'cies live in fnngi and are gregarious. 



KEY TO INDIANA SPECIES OF GYR0PH.T:NA. 



(I. .\ntenii;i' ;diniiitly dilated lieymid flie fourth joint, the last seven joints 

 foiMiiiiig a liKrse |iai-allel club. 

 //. I'^lylra and .-ibdonien aliimsl wholly hlnci< (i|- iiiceoiis. 



(i.",r>. COKRUSC'ULA. 



hh. lOlyli-.-i .Mild abdomen aliiiusf wJKilly pale. {',:]{]. lohata. 



(/'/. Antennal joints gradually enl.-irged from fourth joint to tiji; abdomen 



bicolored. 



c. Eyes always separated by moiv than twice their own width; base 



and apex of abdomen pale. (;;!7. vinula. 



cc. Eyes more convex, sepai'ated hy not more than tlieir own width; 



basal half of abdomen jiale. apex black. <].'>s. dissimius. 



