LONGS SECOND EXPEDITION. 231 



tinged with rufous ; tergum on the second, fourth and fifth seg- 

 ments with a transversely oval spot. [342] 

 Length three-tenths of an inch. 



4. C. trifasciatus.— Black : scutel, two spots on the collar, 

 base of the antennae and lateral spots of the tergurn, yellow. 



Inhabits North-west Territory. 



Body with numerous, short hairs; hypostoma silvery; first 

 joint of the antennae and middle of the mandibles, yellow; thorax 

 punctured ; collar with two yellow spots ; scutel yellow ; meta- 

 thorax with dilated, confluent punctures, and an impressed longi- 

 tudinal line ; wings fuliginous, nervures brown ; pectus with a 

 yellow spot before the wings ; feet yellow, thighs, and a line on 

 the inner side of the tibiae, black ; tarsi dusky at tip ; tergum 

 polished, impunctured ; a yellow band on the middle of the 

 second segment interrupted above : a short yellow line each side 

 of the third segment; a yellow band on the fourth segment, 

 slightly interrupted above ; a yellow band on the fifth segment, 

 not interrupted but only slightly emarginate above; venter im- 

 maculate. 



Length two-fifths of an inch nearly. 



PHILANTHUS Fabr. Latr. 



1. P. punctatus. — Black; head and thorax with yellow spots; 

 tergum with large punctures and four yellow bands. 



Inhabits Pennsylvania. 



% Eyes very slightly emarginate ; a longitudinal line each side 

 of the hypostoma, a triangular spot on the middle of the anterior 

 margin, another on the front, a small rounded spot on the basal 

 joint of the antennas before, a small dot each side on the vertex, 

 and another behind each eye, yellowish-rufous; thorax uneven, 

 with large profound punctures : a line on the collar, another on 

 the scutel, before [343] which is a smaller one, and wing-scale, 

 yellow ; wings fuliginous ; pleura with a double yellow spot be- 

 neath the anterior wing : feet honey -yellow, thighs black at base, 

 tibiae bright yellow before; tergum rough with large profound 

 punctures; first segment rounded, immaculate; second with a 

 broad, yellow, slightly arcuated line, touching the anterior ed 

 and curving towards the posterior angles; third, fourth and filth 

 segments, each with a narrow, dull yellow baud on the posterior 

 margin ; venter immaculate. 



