THE GROrxn l^EETLKR. 113 



XXVIll. Dii'i.ociiiLA l-.nill.'. IS^f). (Gr., '-(lonl)!!' I lip.") 



Smootli l)l;ick beetles of siuiill ov nn'diuin size. Elvira usually 

 with one dorsal puncture near the middle of the third interval, tlu- 

 apex feel)ly sinuate. They live beneath stones and rut)l)ish. usually 

 in damp places. Three species and two varieties arc known from 

 the United States, all of which oceui" in Indiana. The following 

 table is based on that of Dr. Horn in Bull. Brooklyn Entomological 

 Society. III. 18S0. p. 52: 



KKV TO SPIX IKS OF DU'I.OCniLA. 



(/. Hind .inirlcs nl' iliiirnx distiiict. 



I). Seventh stria of elytra rcchlc m- almost ol)solete ; base of thorax 

 broader tliaii aju^x. 

 c. Smaller, 1:5-15 iiini. 170. i^vtrollis. 



cc. Larger, 18 or iiioie mm. 17<ia. var. ma.iok. 



hh. Seventh stria abnul as distinct as sixth: thorax less narmwcd in 

 front, base nmre nai'i-oweil. scarcely broader than aiu'x. 

 (I. Klytral intervals all black. 177. impki'.sskom.is. 



(Id. Alternate elylial inl( I'v.-ils reddish-i)nr]ile. 



177a. var. ai.ii:k.x,\.\s. 



'/'/. Hind angles of thorax obtusely rounded: elytral stri;e finer, seventh 



almost obsolete; length 11-12 mm. 178. obtusa. 



*17() (710). DiPLOiiiii.A L^vTuoi.i,is Lee. Ann. Lye. Nat. Hist.. TV. 1S48. 

 311). 

 Black, feebly shining; antenuie and tarsi dark brown, the liasal Joints 

 of both pieeous. Thorax one-half wider than long; sides curved to behind 

 middle, thence oblique to base; hind angles rectangular. Elytra tiuely 

 alutacenus. the striio shallow, not or very faintly punctured : Intervals fiat. 

 Length 1?> 1.5 mm. 



Throughout the State ; frequent. F(>l)ruary (l-October 9. Some- 

 times attracted by electric lights. 



17Ha (710a). Diei.ocuiLA LATicou.ts ma.iok f.ec.. loi-. cit.. :'.1S. 



In addition to its larger siz<\ this loi'm has the basal imiiressions cf 

 thorax broader and mi>re shalh w. the elytral stria^ finely but distinctly 

 piuictate. the seventh fainter, (ttteii wholly obsolete. Length 18-20 mm. 



Throughout the State: common March 18-October 27. Lsuallx 

 considered a variety of lalicoUis. Init |)ro1inbly distin<'t. 



177 (711). Du'LocHiiA iMPREssicoLLis Dej.. Siie*. V. ls:!o. tiS2. 



Black, .\iiex of thorax less narrowed than in luiicollis. nearly as 

 liroad as iiase. Kl.xtial stria> deepei'. rather coarsel.x pnnciufed: intervals 

 more eoin-ex. I.englli Ki 17 mm. 



Lake. Lapoiic and Vigo coinities; scai'i-e. March 18-July 7. 



