THE CANADIAN ENTOMOLOGIST. 27 



DESCRlPTlOxV OF LARVA OF INGURA DELINEATA, Guen. 



BY HARRISON G. DYAR, WASHINGTON, D. C. 



I have named my specimens in accordance with the material in the 

 National Museum, arranged by Prof. Smith. The result is unsatisfactory, 

 because this is the gum-tree larva described by Edwards and Elliot as /. 

 prcBpilata, Grt. (Papilio III., 135). The larva mentioned in Guene'e as 

 deiijieata has a different food plant. There is evidently some confusion 

 here, which must be adjusted by the next monographer of the genus. 



Egg. — Low and flat, domed, like Apatela, the edges wavy, thin and 

 flat. Surface smooth, with numerous rows of little elongated beads 

 radiating regularly from the micropyle, reaching the number of about 160 

 around the margin. The points of increase are not perceptible, as the 

 surface is entirely flat, without ribs, and the beads not contiguous. 

 Transparent, colourless, green from the leaf showing through. Diameter 

 1.2, height .2 mm. 



Stage I. — Head bilobed, long, shining pale brownish; width .3 mm. 

 Body slender, translucent ochreous-yellow ; setas normal, long, stiff, 

 brownish, arising from small rounded brown tubercles. Tubercle iv. is 

 behind the spiracle about equidistant between iii. and v.; vi. not present. 

 Feet normal ; no markings. 



Stage //. — Head whitish-yellow; width .45 mm. Body slender, 

 anal feet stretched out behind, thorax a little enlarged. Pale yellowish, 

 rather translucent, the food showing green, darkest in the, thorax. Skin 

 a little shining, smooth, the segmental incisures of joints 4 to 1 1 very 

 well marked. Setaj five, rather long ; tubercles obsolete. 



Stage III. — Head translucent, pale yellow; width .8 mm. Slender, 

 smooth as before, but the incisures of joints 5 to 1 1 folded and marked 

 in pale yellowish pigment, giving six faint, transverse intersegmental bands. 

 Four tubercles on the anterior edge of cervical shield are minutely black. 

 No other marks. Setae smaller than before, except at the ends. 



Stage IV. — Less slender, thicker and a little flattened, tapering 

 behind ; width of head 1.2 mm. Translucent green, head slightly 

 whitish ; intersegmental bands supplemented by a broken subdorsal, and 

 continuous, straight stigmatal line, pale yellow, the subdorsal consisting 

 of a dot behind tubercle ii. and a dash below it, distinct except on the 

 thorax. Blood somewhat green ; setai pale; feet slender. 



