H2 FAMILY XI. — staimiyi.ixid.t;. 



Till (LMI.*)). Si'km's Ai.ACKR C;ise.v. Uev. Stt'ii., 18S4. 185. 



Eluiij,Mto, sh'iidrr. Black, siiiiuiij^, vt-ry liiiely and sparsely pultesceiit ; 

 U'gs dull yellow, very hmj? and slender, the I'eniora [liceous at tips; palpi 

 pale yellow. Head two lliirds wider than iont:;, surface between the eyes 

 deeply e.xcavalr. sparsely and uneverdy |)uncture<l and with a distinct me- 

 dian carina, .\ntcniia' brownish, (aiehalt jnniici' than width of head. Ilic 

 third joint one third lon.^^er than lourlh. 'I'hora.v snbcylindrical, widest 

 slightly beiiind the middle, one-si.vth longer than wide, coarsel.v, densely 

 and roughly punctale. Klytra ;it base as wide as head, suture slightly 

 longer than thorax ; very roughly, densely and coarsely punctate. Abdomen 

 nuicli nai-rower than elytra, tapering from base to ajtex ; coarsely and 

 closely punctate near base, finely and sparsely toward apex. Length 3.2- 

 o.T mm. 



Posey County ; rare. April 22. Taken from beneath mtillein 

 leaves on a sandy hillside. A member of the Aiistroriparian fauna, 

 known from Florida, Texas and southern Illinois. 



Group IV. 



The members of this grottp differ from those of the preeeding 

 only in having the fourth .joint or tarsi distinetly bilobed beneath. 

 The abdomen is subcylindrical, usually tapering from the base and 

 without distinct side margins. The following species have been 

 taken or may occur in the State: 



KEY TO SPECIES OF GROUP IV. 



'/. Fourth and tilth abdominal segments wider than the first; length 4- 

 4.4 mm. auvena. 



(Ui. Abdominal segments decreasing regularly in width from tlie base, the 

 fourth uot wider than first. 

 I). Large species, o.t; mm. or more in length. 

 c. Femora and tibia; not black throughout. 

 '/. Legs and antennai almost wholly pale dull yellow, the tips of hind 

 femora alone darker; head slightly broader than elytra. 



795. Fi^vic'ORNis. 

 (Id. Legs black, the femora reddish-yellow at base. T'.m;. annularis. 

 cc. Femora and tibiie wholly black, tlie tarsi pale. 



e. Thorax equally wide at base and apex. tarsalis. 



cc. Thorax distinctly wider at apex than base. 797. canadensis. 



////. Smaller species, uot exceeding 3.4 mm. in length. 



/. Legs pale yellow, the femora darker at tip; length 3-3.2 mm. 



798. CALLOSUS. 



//. r^gs dark fuscous brown in color thi-oughout. 

 y. Thorax distinctly longer than wide. 



h. Elytra very slightly longer than lliorax. their punctures very 



coarse; length 2.8 3.4 nun. 799. arculus. 



hh. Elytra one-third longer than thorax, their i)unctures flue and 



close; length 3 3..'! mm. 800. punctatus. 



</</. Thorax as wide as long; length 2.8-3 mm. hubbabdi. 



