NO. 1290. LARVJ^. OF MOTHS FROM COLORADO— DYAR. 411 



shaped blotch inine.s, with a hole hy which the frass is extruded; they 

 also spin among- the terminal leaves or flower bracts Avith a delicate 

 wel) in which the frass is contained. The food plant is Allionla nyc- 

 taghwa. Larvae from Salida July 25. First imag-o August 4. 



LITHOCOLLETIS CINCINATIELLA Chambers. 



Larva. — Strongly flattened, the segments projecting roundedly lat- 

 erally; joint 2 large, 8 smaller, then gently enlarged to the center and 

 tapering to end. Dorsal and ventral plates the whole length, subcor- 

 neous, nearly colorless. No feet; black spots in place of the thoracic 

 feet, and dark scars on joints 7 to !> and 13. Dorsal marks on joints 2 

 to 4 just like the ventral foot scars. Head triangular, very pointed, 

 the mouth widened by the transverse, projecting labrum; ocelli black, 

 one remote above the others; palpi projecting nearly at right angles; 

 clypeus band shaped, broadened above, edged by the parallel para- 

 clypeal pieces; pale luteus, sutures and mouth black. Body whitish, 

 purple dotted on the sides of the segments, dark orange on the sides 

 of joint 2 and anterior half of joint 3. A dorsal and ventral difl'use 

 purplish shade, not quite reaching the ends. 



The mine is large, 30 mm. or more in length, flat, slightly ribbed; 

 several larvae in a mine. Found on oak at Manitou. Usually the oaks 

 were not infested with leaf minei's, but this place proved an exception. 

 The species were, however, members of the Atlantic Coast fauna. 

 Lithocolletis 'basistrigella Clemens, L. Jitchella Clemens, and Tinheria 

 clnctipenneUa Clemens were the other species occurring on the oaks 

 at Manitou. 



LITHOCOLLETIS SALICIFOLIELLA Clemens. 



Larvte in elliptical blotch mines under the lower epidermis, white, 

 finally eating through to the upper epidermis in dots and patches, 

 usually mostly so about the edges; mine about 17 by 9 mm.; a slight 

 fold down the long diameter. Singly or, rarel}^, two on a leaf. 



Larva. — Head cordate but only very slightly lobed, clypeus high, 

 band shaped, but narrowed to a point where it touches the vertical tri- 

 angle, whitish, the sutures and a difl'use shade on lateral margin brown; 

 a black speck with a smaller one within on the face of each lobe; sev- 

 eral black specks on the ventral aspect of lobe; antenna' small but dis- 

 tinct. Bod}" arched above, gently flattened below, moniliform, joints 

 3 and 4 larger than 2, 5 small, then gradualh^ larger to H and gradu- 

 ally smaller to 13, which is scarcely divided and not sharply smaller. 

 Cervical shield weak, concolorous. Joints 2 to 6 white, 7 to 12 yel- 

 low, with large, rounded, brown-black dorsal spots, flattened posteri- 

 orl}"; dark ventral spots on joints 6 to 12 and a faint one on joint 5; 

 joint 13 somewhat translucent, luteous above and below. Thoracic 

 feet large, projected laterally, exceeding the bod}-, well jointed; 



