THE CANADIAN ENTOMOLOGIST. 127 



MICRO-LEPIDOPTERA. 



BY V. T. CHAMBERS, COVINGTON, KY. 



Continued from Pa*e 112. 



LITHOCOLLETIS. 



1 8. — L. desmodiella Clem., loc. cit., p. 320. 



This is the smallest known American species of the genus, if not the 

 smallest of all known species of it, measuring scarcely }i in. alar. ex. It 

 is very pretty — to the naked eye sparkling like microscopic gems of differ- 

 ent colours, or like diamonds set in rubies. The pattern of coloration 

 resembles that of corylisella, but still more that of Leacanthiza ornaiella, 

 which it resembles closely, except that it is much smaller and lacks the 

 iridescence and changeable colours of that insect. 



Larva of the first group. — Mines the under surface of leaves of different 

 species of Desmodium. I have met with it only in August and September 

 and rarely then. Pennsvlvania and Kentuckv. 



* * With a basal streak. 

 t With fasciae. 



19. — L. ambrosiaella. N. sp. 



Face, palpi, undersurface, and legs (except a reddish-orange patch on 

 the outside of the posterior tibiae) deep steel-blue metallic. Antennae dark 

 brown, annulate with white. Tuft reddish-orange with white scales on 

 each side. Thorax and anterior wings reddish-orange, with a snow-white 

 streak crossing the anterior margin of the thorax, passing back over the 

 tegulae and continuous with a short median basal white streak on the 

 wings and which is faintly dark margined behind. A wide snow-white 

 costal streak about the basal ^th dark margined behind ; a snow-white 

 fascia about the middle of the wing dark margined distinctly behind and 

 faintly so before. A costal white streak and an opposite dorsal one at the 

 base of the ciliae, both dark margined behind and faintly so before. A 

 white fascia just before the apex becoming indistinct near the dorsal 

 margin and faintly dark margined behind. Ciliae of the general hue. 

 A/, ex. y± in., Kentucky; common. 



Larva cylindrical, yellowish, with the head streaked and suffused with 

 fuscus. It makes a very small tent mine on the under side of the leaves 

 of the" "great hog weed' 1 (Ambrosia trifida). There is a very similar 

 mine on the under surface of the leaves of HeliantJius giganteq, but I have 



