78 BULLETIN OF THE BROOKLYN EXT. SOC. 



A New Species of North American .ffigeriadee. 



By A. R. Grotk. 



Trochilium (Sciapteron) simulans, n. s. 



Size large, body stout and long. Yellow and black and very wasp- 

 like. Clypeus black; a broad yellow stripe on each side from the 

 base of the antennae downward, margining the eyes in front. Ocelli. 

 Collar yellow behind, black in front. A yellow spot on each side of 

 the thorax in front immediately below the collar. A yellow spot in 

 front of the insertion of primaries; another on the sides of the thorax 

 beneath the wings. Thorax black, tegulse with yellow terminal edg- 

 ing, A transverse yellow line behind. Palpi applied to the front ; 

 terminal joints yellow; basal joint black, with longer yellow and 

 black dependent hairs beneath. Legs yellow shaded with rusty ; 

 femora blackish within ; coxa? yellow. Abdomen yellow with a sub- 

 obsolete row of black spots along the dorsum; basal segment black; 

 segments very narrowly edged anteriorly with black above; beneath 

 about half yellow and black ; anal tuft rusty at tip, else yellow over 

 black. Wings without discal spots. Fore-wings brown with a pel- 

 lucid patch at internal angle and sub-diaphanous at base. Hind- 

 wings clear with a yellowish stain, fringes and hervures rather pale 

 brown. Antennae rather short, blue-black. 



Expanse, 36 mil. Length of body, 23 mil. Illinois, Algonquin. 

 Collected by Dr. Nason, June 27th. 



A little stouter than denudatum, wanting the discal, sub-costal 

 marks, with the primaries less densely scaled, and with the body 

 yellow and black without brownish shadings. 



I have had this species sometimes, and suspected it to be Dr. 

 Harris's marginatum, but from his description that must be different, 

 Harris does not mention the yellow collar nor the yellow transverse 

 line on the thorax behind ; the abdomen is described as having the 

 hind margins of the segments yellow, whereas the segments above are 

 almost entirely yellow in simidans, with very narrow black anterior 

 edging, the basal segment wholly black, and there is a series of in- 

 distinct black spots on the dorsum ; the palpi are black beneath at 

 base. The wings have no "broad black fringe" to the secondaries. 

 The wings are shorter and paler than denudatum, without any discal 

 marks; the fringe to the secondaries rather short and pale (my type 

 is in perfect condition). The disposition of the hyaline and brown 

 portions of the primaries is quite like denudatum, and Dr. Harris's 

 description of the wings of marginatum differs throughout from simu- 



