THE STATE ENTOMOLOGIST. 121 



solet, near tie base; orbicular spot flattened and well defined by a black annulation ; 

 reniform spot indicated by a blurred black mark running: on tbe cross-vein and some- 

 times somewhat crescent-formed ; a V-shaped spot pointing towards base half-way be- 

 tween costa and interior margin, in a transverse line with the large costal spot which 

 looks like a blurred X; a blurred mark in middle at base, and lastly a narrow spot on the inferior 

 margin, half-way between base and anal angle. Hind wings same color as front wings ; somewhat 

 more glossy, with the lunule, a band on posterior border one-fourth the width of wing, and some- 

 times a narrow coincident inner line, somewhat darker than the rest; the posterior border also 

 with a series of spots one between each nerve. Under surface of front wings pearly-white with 

 an arcuated brown band, most distinct towards costa, across the posterior one-third, all inside of 

 this band of a faint yellowish-brown : lunule and fringe spots distinct, and with a faint trace of 

 the psi-spot; hind wings uniform pearly-white with a distinct and well defined dark wavy line run- 

 ning parallel with posterior margin across the posterior one-third of wing, and with the lunule 

 and fringe spots distinct. Antennae simple and bristle-formed, gray above, brown beneath. Head 

 thorax and body, both above and below, silvery-gray. Legs with the tarsi alternately dusky and 

 gray. $ differs from $ by his somewhat stouter antenna? ; much narrower body, and narrower 

 wings and fringes, the front wings having the apex more acuminate, and the hind wings scarcely 

 showing the darker hind border. 



Described from 2 $, 2 ^ all bred. In the ornamentation of the front wings this species bears 

 some resemblance to the European species tridens and psi, but otherwise differs remarkably, and 

 especially in its larval characters. It bears a still closer resemblance both in the larva and imago 

 state to the pale variety of a common species known in England as the "Miller" (A. lepoiina), but 

 judging- from tbe figures and description in "Newman's Natural History of British Moths," it may 

 be easily distinguished from leporina by the well defined orbicular spot, by the greater proximity 

 of the two large costal spots, by lacking a round spot behind the disk, and by the more prolonged 

 apex. It differs also in the larva state from leporina which feeds on the Birch. It likewise closely 

 resembles interrupts, though the larva) are remarkably different ; and it also resembles lepusculina, 

 the larva of which is unknown ; but the specific differences will be readily perceived upon compar- 

 ing Guenee's descriptions. How near it approaches to Acronyeta occidentalis, Grote,* it is impos- 

 sible to tell, as the author's description is exceedingly brief, considering the number of closely 

 allied forms ; but as that species has a bright testaceous tinge on the reniform spot, it evidently 

 differs from mine. Harris's Apatela [Acronyeta] Americana,-]- though very different in the imago, yet 

 closely resembles populi in the larva state. I have on two occasions found the larva of Americana 

 feeding on the Soft Maple, and it may be distinguished from populi, by its greater size; by the 

 paler color of the body ; by the hairs being paler, more numerous, shorter and pointing in all di- 

 rections, especially anteriorly and posteriorly of each segment; by having on each of joints 4 and 

 6 two distinct long black pencils, one originating eachside of dorsum, and on joints 11 one thicker 

 one originating from the top of dorsum; by a substigmatal row of small black spots (three to 

 each segment, the middle one lower than the others) and by a trapezoidal velvety black patch 

 starting from anterior portion of joint 11 and widening to anus. 



THE MISSOURI BEE-KILLER— Asilus Missouri as is, N. Sp. 



(Diptera AsilidaD.) 



On page 168 of my First Report an account is given, with a very- 

 poor figure, of a large two-winged fly which was first received by Dr. 



*Proc. Ent. Soc. Phil., VI, p. 16. 



fl am surprised that Dr. Morris (Ha>r. Inj. Insects, p. 4.%, Note) refers this species to Guenee'* 

 acericoln, when the larva of the latter, as described by Guenee himself, is so different and feeds 

 withal on Birch and Alder, and not on either Maple, Elm, Linden or Chesnut. 



