374 MACLURIAN LYCEUM. 



2. I. concinnus. — Antennae black with white annulations ; 

 tergum white with six or seven black bands. 



Inhabits Indiana. 



Head white ; a broad black vittae extending from the black 

 occiput, two black abbreviated lines beneath the antennae, each 

 terminating near an indented point ; mandibles brown at tip, a 

 black line from their base to tip ; antennas black ; 9 to the 17 joints 

 inclusive, [69] 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 middle ; scutel and 

 small transverse line behind it, white ; metathorax with two 

 longitudinal lines, on each side 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; coxas white; posterior 

 feet, coxae with a wide much indented black band ; thighs black- 

 ish at base; venter somewhat dusky; central cellule of the wings 

 as in the preceding. 



9 A single line beneath the antennae and an irregular line 

 above the mouth, black ; double white line on the thorax widely 

 separated ; an abbreviated, oblique white line from the edge of 

 the scutel towards the superior wings ; tergum with the black 

 band of the first segment not terminal ; feet honey yellow ; coxae, 

 excepting the posterior pair, white ; tip of the tarsi black ; ovi- 

 duct blackish piceous, less than half the length of the abdomen. 



Length over two-fifths of an inch. 



Second joint of the maxillary palpi dilate, as in Peltastes Illig. 



3. I. otiosus. — Antennae black with a white annulation; ter- 

 gum with a white band on the base of segment. 



Inhabits Indiana. 



Body black with a white orbital line, broader before and ob- 

 solete above; antennas 9 to the 14 joints inclusive, white; thorax 

 with a line before the wings, interrupted before, and two abbre- 

 viated lines on the disk slightly diverging anteriorly, white ; scu- 

 tel and transverse spot behind it, white ; central cellule of the 

 wings [70] as in the preceding, but the superior side is somewhat 

 shorter ; tergum, first segment with a triangular band at tip ; 

 pleura with a white, longitudinal, abbreviated line beneath the 



