1911] Hypera and Phytonomus in America 459 



scarcely curved, point sometimes very slightly turned up. The side view 

 (Plate XXIV, fig. 11) is never as in nuies strongly curved and from the 

 dorsum there can never be seen the peculiar knob-like point possessed 

 by murinus (Plate XXIV, fig. 12). 



The coloring and pattern of the scales in this species is so variable 

 that it is difficult to describe; and rarely a few specimens have been 

 observed that were as green beneath as nigrirostris and as gray green 

 above as comptus sometimes appears. 



Egg: (Plate XXXV, fig. 8). Oval, rounded at ends, lemon-yellow 

 in color when first laid, very slightly roughened, hexagonally sculptured, 

 at one end the depressions are drawn out until they appear as fine stria?. 

 Two to four days after being deposited a dark spot appears at one end 

 as this enlarges the egg becomes paler in other portions, when read}' to 

 hatch it is usually shining black where the larval head is beneath the 

 shell and pale yellow or whitish elsewhere. Length 0.55-0.65 mm. 

 Width 0.32- 0.38 mm. 



Larva: (Plate XXXI. figs. 1-2, Plate XXXII, figs. 1,2,9). First 

 stage: 1.4-1.5 mm. long and O.-'Jli mm. wide. Head shield dark with only 

 a faint trace of the inverted Y, remainder of body pale dirty yellow with 

 black tubercles of segments distinct. Hairs on anal segments longest, 

 all enlarged at tips. Very faint indication of a dorsal s1 ripe. 



Second stage: head darker, inverted V a dirty white, white median 

 dorsal line distinct, remainder of larva green, lighter than plant on which 

 it is feeding. 3.2—4.8 mm. long by 0.7-1.1 mm. wide. 



Third stage: entire larva dark ergreen. sometimes the dorsal white 

 line has a rosy red border as in Hyp. punctata. A distinct pale stripe is 

 now present on the side of the body below the spiracles ; inverted Y on 

 face clear and white. Length 5 to 5.7 mm., width 1.2 to 1.7 mm. 



Fourth stage: very little different from the third, larvae reaches a 

 length of from 7 to 10 mm. and may become as wide as 2.2."> mm. The 

 rosy-red of the outer border of the pale median line is much more evident 

 in this stage. 



The arrangement of the tubercles is very characteristic. On the 

 first thoracic segment there are three rows (the tubercles are always 

 arranged in pairs on each side of the dorsal line) the first row with 12, the 

 second with 2 and the third with 10. Second segment and all follow- 

 ing with at least two rows the anterior of which has but a single pair of 

 tubercles. The posterior on the second segment, 12 tubercles; third 

 segment, 16; fourth and fifth the same; the sixth with 18; seventh with 

 20; eighth with 16; ninth with 14; tenth with 12, in the posterior, and 

 eight in a middle row; eleventh with S in posterior row and 10 in the 

 middle; twelfth with 10 in the posterior row, strongly curved forward in 

 a line. On the sides of the first enlargement below the spiracles are 

 always two hairs situated on tubercles. 



Cocoon: (Plate XXXI, figs. 3, 9). varying in size from 4 to 8.5 

 mm. and occasionly one with one of the axes still longer. Usually oval 

 or globular, depending somewhat on where it is formed. It is composed 

 of pure white threads spun in a rather coarse network, meshes not very 

 regular. 



