MACLURIAN LYCEUM. 383 



SERLTON Latr. 



S. TERMINALIS. — AntcnnaB, terminal joint white ; wings uni- 

 fasciate. 



Inhabits Indiana. 



Body somewhat piceous ; head yellowish ; antennae broken, 

 blackish ; first joint nearly as long as the others together ; ter- 

 minal joint dilated, compressed, subtriangular, white ; wings with 

 a broad dusky band; intermediate tarsi white except at tip. 



Length more than one-twentieth of an inch. 



PSILUS Jur. 



1. P. CILIATUS. — Black ; feet whitish ; hairs of the wings 

 elongated. 



Inhabits Indiana. 



Body black, polished ; anteunse with an oblong oval acute club, 

 at base honey-yellow ; petiole of the abdomen and feet honey- 

 yellow ; wings deeply ciliated, the hairs longer tnan the trans- 

 verse diameter of the wings. 



Length less than one-twentieth of an inch. 



2. P. OBTUSUS. — Black ; feet whitish, thighs black in the mid- 

 dle. 



Inhabits Indiana. 



Body black, polished ; antennae fuscous ; anterior wings white 

 and very obtuse, finely ciliated; ciliae very short ; feet whitish j 

 thighs black, white at base and tip ; coxae black. 



Length nearly one-twentieth of an inch. 



PL AT YG ASTER Latr. 



3. P. PALLIPES. — Body black ; antennae fuscous, moniliform : 

 basal joint honey-yellow ; wings hyaline ; abdomen polished, 

 much depressed ; widest near the tip and obtuse, gradually and 

 rectilinearly a little narrowed to the base : feet whitish-yellow. 



Length one-thirtieth of an inch. 



BETHYLUS Latr. 



B. ARMIFERUS. — Black ; tergum with elongated white hairs. 



Inhabits Indiana. 



Body entirely black, immaculate, with short hairs; head 



