TROCHILIUM. 331 



Abdomen sessile, tufted at the tip. Hind tarsi very slender and 

 smooth, as long as the tibice. 



Head and labial palpi deep reddish-orange, the former white in 

 front of the eyes. Antenna bluish-black, the basal joint reddish- 

 orange in front. Thorax ochreons yellow, with the tegula? in front 

 touched with pale bluish-black. Abdomen bluish-black, varied 

 with ochreous yellow; terminal tuft deep reddish-orange. Fore 

 wings with the margins and median nervure bluish-black, dusted 

 with yellowish ; a large discal, bluish-black patch ; terminal por- 

 tion of the wing ochreous yellow, with a blackish subterminal 

 band, and the nervules blackish ; the hinder margin bluish-black 

 and the cilia deep fuscous. Hind wings with a black discal patch ; 

 nervules blackish, and hinder margin blackish. Under surface of 

 the body ochreous yellow, with a bluish-black patch on each side 

 of the second abdominal segment. The middle and posterior 

 tibia? annulated with bluish-black at their ends; the anterior 

 blackish, with the coxa? touched with reddish-orange. All the 

 tarsi touched with blackish above. The larva bores the trunk of 

 the maple. 



Northern States. 



CLEMENS. 



Group Parantlireue. 



14. T. bassiformis Walker. C. B. M. VIII. 39. 



Male. Black. Head with red hairs behind. Palpi red, with 

 some black hairs beneath. Antenna? red, minutely pectinated, 

 very slightly thickened towards the tips, very much longer than 

 the thorax. Thorax with two testaceous (?) stripes. Abdomen 

 with testaceous (?) dorsal spots, much narrower than that of P. 

 vespiformis. Posterior tibia? with a single testaceous band ; fore 

 tibia? and anterior tarsi red; hind tibiae and hind tarsj much longer 

 than those of ^E. vespiformis ; hind tarsi testaceous. Fore wings 

 purplish, with a limpid basil stripe, and with a reddish streak in 

 front. Hind wings limpid, with a lurid tinge ; cilia? cupreous. 

 Length of the body 6i lines ; of the wings 12 lines. 



United States. 



WALKER. 



15. T. pyramidalis Walker. C. B. M. VIII. 40. 



Male. Black. Head with yellow hairs about the eyes. Palpi 

 yellow beneath; third joint elongate-conical, much less than half 



