long's second expedition. 223 



Head with short cinereous hair, somewhat longer about the 

 mouth ; densely punctured; thorax and scutel densely punctured, 

 and with scattered, cinereous short hair; posterior segment of the 

 former, with two light parallel impressed lines; wings hj-aline, 

 nervures fuscous ; metathorax with a longitudinal, impressed, 

 very distinct line ; and a transverse one at base ; hair more ob- 

 vious each side ; punctures smaller than those of the thorax ; ab- 

 domen more hairy than any other part of the body. 



Length three-tenths of an inch. 



This insect also occurred on the Missouri, at Engineer Can- 

 tonment, and in Pennsylvania. 



TIPHIA Fabr. 



1. T. INORNATA. — Black, immaculate; wings yellowish fjli- 

 ginous. 



Inhabits Ohio and Pennsylvania. 



Head punctured ; antennae piceous, paler towards the tip ; 

 mandibles piceous, blackish at tip; thorax punctured, wing-scale 

 and posterior margin of the first segment impunctured, edge of 

 the latter piceous ; metathorax with three longitudinal, slightly 

 elevated lines ; posterior edge also slightly elevated into an acutt; 

 line ; feet hairy, tibias and tarsi more or le^ piceous ; abdomen, 

 particularly behind hairy. 



Length three-fifths of an inch. [332] 



2. T. INTERRUPTA. — Black, stethidium with yellow spots; 

 tergum with yellow spots and bands. 



Inhabits Pennsylvania. 



Antennae dull black-brown, first joint polished, piceous at tip; 

 mandibles piceous, black at tip ; thorax with a spot each side be- 

 fore, three in a line between the origin of the superior wings, yel- 

 low ; scutel with a yellow, transverse line ; wings hyaline, costal 

 margin fuliginous ; metathorax at the tip each side with a double 

 longitudinal, yellow spot; pleura with a vertical, yellow, oblong 

 spot beneath the origin of the superior wing ; tarsi pale piceous ; 

 tibiae, anterior pair blackish-piceous, posterior pairs pale piceous ; 

 thighs black ; tergum a little iridescent; first segment with a 

 band abruptly and widely narrowed above; second segment with 

 an oval spot each side ; third segment, band gradually narrowed 



