6 
Psyche 
[March- June 
colorous with body. Meadow green mid-dorsal line due 
to absence of the bright chalcedony yellow spots which cover 
the rest of the body. Spiracles concolorous with body. 
Larva nearly naked. Very few exceedingly small colorless 
tapering hairs. 
Each instar required four days. 
Pyrgus syrichtus Fabr. 
Second Instar. Head height .55 mm. ; head width .57 
mm. Widest at the level of the adfrontal punctures, nearly 
flat-topped. Piceous. Body length 3.5 mm. Very light 
greenish. Legs and spiracles concolorous with body. 
Shield concolorous with head. Many short, colorless, spatu- 
late hairs scattered over the surface of the body. Hairs 
on subventral fold and anal plate tapering. All hairs aris- 
ing from prominent cream colored tubercles. 
Third Instar. Head height .87 mm. ; head width .90 mm. 
Head piceous, nearly black. More rugose than in foregoing 
instar. Adorned with scattered colorless tapering hairs. 
Length of body 6 mm. Shield smooth, piceous. Faded 
fuscous mid-dorsal line. Six long, colorless, spatulate hairs 
on either side of the median line in the anterior border of 
the shield. The more lateral two are located dorsad and 
slightly cephalad of the large circular brown spiracle. On 
the posterior edge of the shield there are two to three very 
short spatulate hairs, also colorless, on each side of the 
median line. Prothoracic legs same color as shield. Body 
same as before, slightly darker green. 
Fourth Instar. Head height 1.3 mm. ; head width 1.6 
mm. Body length 10 mm. Not much change from third 
instar. 
Fifth Instar. Head height 2.2 mm. ; head width 2.4 mm. 
Piceous. Very rugose. No conspicuous protuberances at 
top of vertex. Dense covering of short tawny hairs. Body 
length 17 mm. A mid-dorsal and, to a lesser extent, a para- 
dorsal bleaching of the shield. Shield chocolate. Body 
chrysolite green. Mid-dorsal line faint. Deep chrysolite 
green. Faint indication of similar narrow para-dorsals. 
Colorless, slightly spatulate hairs numerous. Arising from 
