684 BOSTON JOURNAL 



pair of coxae honey -yellow : feet pale honey-yellow ; posterior 

 pair of thighs at tip, their tibite from the middle to the tij) and 

 their tarsi black : venter, in the middle, white. 



Length nearly three-tenths of an inch. 



A small frontal escutcheon and sessile abdomen led me to 

 place this insect here, although the palpi are not dilated and the 

 wing cellules diflfer, 



AGATHIS Latr. 



1. A. POLITA. — Black; antennae, tibiae and tarsi yellowish. 

 Inhabits Indiana. 



% Body deep black, highly polished : head yellow : vertex, 

 front and ej'cs on the posterior margin, polished, black : antennae 

 honey-yellow : mandibles honey-yellow, black at base and tip : 

 posterior orbits and posterior margin of the vertex, yellow : occi- 

 put obscure honey-yellow : thorax with a double, yellow, central 

 spot, cordate spot on the scutel, abbreviated, transvei-se line be- 

 neath it, and posterioi margin of the metathorax, yellow : wings 

 blackish-brown ; second cubital cellule quadrangular : tergum 

 with a yellow band on the posterior margin of the first and 

 second segments, slightly interrupted [226] in the middle : feet 

 honey-yellow : posterior thighs black : the tibise pale, and tarsi 

 yellow. 



9 Thorax with a hardly visible, piceous vitta on each side of 

 the central spot ; abdomen towards the tip attenuated. 



Length nine-twentieths of an inch. 



2. A. ORNATA. — Black, varied with yellow; tergum yellowish, 

 fasciate with fuscous. 



Inhabits Indiana. 



% Body black, polished : head yellow, a black frontal spot 

 confluent with a black transverse line of the vertex, that is con- 

 tinued on the posterior margin of the eyes : antennae honey-yel- 

 low, somewhat dusky above : mandibles blackish at tip : thorax 

 with a broad, yellow margin, interrupted before, and double cen- 

 tral spot : scutel and two or three small spots beneath it yellow : 

 metathorax with a small spot behind the wing and posterior 

 margin yellow : wings fuliginous : stigma and costal nervure 

 honey-yellow ; second cubital cellule quadrangular : tergum yel- 



[Yol. I. 



