410 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



Larva. — Head pale brown ; body yellowish-green, with oval, dorsal, brown macuiss 

 darkest on their margins; thoracic rings on their sides pale yellowish. (Clemens). 



Moth. — Front silvery, tuft reddish-orange and silvery mixed. Thorax reddish- 

 orange. Fore-wings reddish-orange, somewhat metallic, with a white streak black- 

 margined exteriorly, /rom the inner basal angle to the fold; with two oblique silvery 

 bands black-margined behind, one about the middle of the wing, and the other mid- 

 way between it and the base of the wing. Near the tip is a costal silvery spot, black- 

 margined behind, with an opposite, oblique, dorsal streak of the same hue, likewise 

 black-margined behind, and an oblique, costal, silvery streak continued on the line 

 of the last dorsal, running into the cilia just before the tip, black-margined above, at 

 the tip before, and below at the tip behind ; scarcely with a hinder-marginal line, 

 cilia oftbe general hue. Hind wings plumbeous, cilia with a fulvous hue. (Clemens.) 



49. HthocoUelis hicidicostella Clemens. 



The larva mines the under side of the maple leaf, Acer saccharinum, 

 in July, September, and October. The head is pale brown ; body pale 

 green, colored darker by the ingesta. "Frass" collected into a ball 

 within the mine. The pupa is suspended in a web of silk within the 

 mine. (Clemens.) 



Larva. — Head pale brown ; body pale green and colored darker by the ingesta, 

 (Clemens.) 



Moth. — Antennse white. Head and tuft silvery-white. Fore-wings, basal portion 

 silvery-white to the middle, with a discal pale golden streak from the base, retreating 

 from the costa before reaching the middle of the w' iug and somewhat suffused with 

 golden beneath the fold. From the middle to the tip pale golden, with four costal 

 silvery streaks, dark-margined internally, and two dorsal silvery streaks, the first 

 opposite the second costal streak and both dark-margined internally ; the first costal 

 streak not decidedly dark-margined.* Apical spot black. Hinder marginal line in the 

 cilia dark brown ; cilia pale gray. Hind wings shining bluish-gray ; cilia gray. 

 (Clemens.) 



50. Brachys sp. 



Mr. V. T. Chambers once wrote me that a Brachys larva also mines 

 the leaves of the sugar maple. He added that "the mines and larvae 

 in the beech, oak, and maple are scarcely distinguishable." 



51. Megachile optiva Cresson. 

 Order Hymenoptera; family APID.E. 



This (or a very closely allied leaf-cutting bee) sometimes greatly 

 disfigures maples by cutting pieces out of the leaves for the purpose of 

 making its cells. " I have seen a small tree nearly defoliated by these 

 bees, of which the habits are most interesting." (Harrington, Rep. Ent. 

 Soc. Ontario, 1887.) 



* There is some mistake in this sentence. The first costal streak is decidedly dark- 

 margined ; the first dorsal streak, it is true, has scarcely a perceptible margin — it 

 should probably be the first costal streak decidedly dark-margined or else the first dorsal 

 streak not decidedly dark-margined. — H. T. Stainton. 



