Descriptions of new species of Hymenoptera. 69 



sive, white; collar yellow, anterior portion black; thorax 

 with a narrow line before the wings widely interrupted 

 before; a double much abbreviated white line in the mid- 

 dle; scut el and small transverse line behind it, white; 

 metathorax with two longitudinal white lines, on each 

 of which is a spine, and a lateral white line interrupted 

 above; tergum yellow; terminal half of the first segment, 

 and basal two-thirds of each of the others, black; pectus 

 black; feet honey-yellow; coxa; white; posterior feet, 

 coxae with a wide much indented black band; thighs 

 blackish at base; venter somewhat dusky; central cellule. 

 of the wings as in the preceding. 



$ A single line beneath the antennae and an irregular 

 line above the mouth, black; double white line of the 

 thorax widely separated; an abbreviated, oblique white 

 line from the angles of the scutel towards the superior 

 wings; tergum with the black band of the first segment 

 not terminal; feet honey-yellow; coxa?, excepting the 

 posterior pair, white; tips of the tarsi black; oviduct 

 blackish, piceous, less than half the length of the ab- 

 domen. 



Length over two-fifths of an inch. 



Second joint of the maxillary palpi dilated as in Pel- 

 tastes, Illig. 



3. I. otiosus. Antennas black with a white annulation: 

 tergum black with a white band on the basal segment. 



Jnhab. Indiana. 



Body black; head with a white orbital line, broader be- 

 fore and obsolete above; antenna;, 9 to the 14 joints, in- 

 elusive, white; thorax with a line before the wings, inter* 

 rupted before, and two abbreviated lines on the disk 

 slightly diverging anteriorly, white; scutel and trans- 

 verse spot behind it, white; central cellule of the wings 

 Vol. I. 10 



