36 ENTOMOLOGICAL NEWS. [Jan., 'lO 



21. Thecla iroides Bdv. 



Has been observed by Mr. Cottle in a nursery in the north- 

 ern part of the city. It is very common across the bay in 

 Marin county. 



22. Thecla dumetorum Bdv. 



A common insect occupying a considerable area in the wes- 

 tern portion of the city. Its larval food-plant here is Erio- 

 gonum latifolium, which is very common in sandy places. 

 During June and July of this year I collected a number of 

 larvae of dumetorum. 



Mature larva Length (at rest) 13 mm., width 4.5 mm. Head 

 small, deeply retracted into seg. I, pale subhyaline brownish, with 

 the base of the antennae and a strip above labrum whitish. Body 

 quite stout, slug-shaped, well ridged, somewhat concave subdorsal and 

 rather depressed at posterior extremity, segmental incisions deep; 

 ground color quite variable (as is often the case in the Lycacnidae}, 

 usually rather pale bluish green or dull translucent pale grayish green. 

 Dorsal line inconspicuous, a little paler than ground. From segs. 2-9, 

 inclusive, the ridge on each side of the dorsum is topped with a coral 

 red blotch (sometimes practically obsolete), which is enclosed by the 

 whitish or pale grayish-white, broken ridge stripe, a part of which al- 

 so runs through this blotch dividing it into the more conspicuous inner 

 and the more obscure outer portion. The blotch is most pronounced 

 at about seg. 4. The ridge stripe is subtriangular on each segment, 

 parallel with the dorsal line on its inner side and sloping obliquly 

 ventrad and caudad exteriorly. An oblique sublateral, dark green 

 dash, plainest on the anterior portion of the segments and sometimes 

 obsolete on their latter half or more. Lateral stripe whitish, distinct, 

 extending from seg. 2 to end of body, in heavily marked specimens 

 this stripe is bordered above and below by purplish. A strong sub- 

 lateral fold. Cervical shield behind and often partly hidden by a 

 bilobed fold, subquadrate, rose color or whitish, with rather sparse, little 

 ring-like tubercles, some piliferous. Feet pale greenish gray, brown 

 tipped. Body somewhat thickly clothed with rather smooth, stout, 

 short pile of pale brown color with darker tips and arising from small 

 plain tubercles. This pile is not of uniform length. 



In another larva the ground color is bright green, the dorsal 

 blotches are rusty red in a broad broken yellowish-white stripe, lateral 

 stripe yellowish-white with coral red borders, cervical shield rose 

 color. Other larvae are pale green and fewer rose color. In one 

 specimen the color is almost wholly coral red and rose and light 

 grayish green ventrad. 



Described from living specimens. 



