566 NEW YORK STATE MUSEUM 



remainder of the body white; legs yellow with black Hne extending 

 backward from the coxa of the second and third pairs of legs over the 

 mesothorax and metathorax respectivel3\ No respiratory filaments, 

 tubercles or lateral fringe are present. The terminal hooks are each 

 supported on a very long two-jointed proleg. 



Pupa. (PI. 13, fig. 8) Length 12 mm. Width 2 mm. Antennae 

 7 mm. Wings 4 mm. Head and thorax yellowish white; antennae 

 and legs yellow; abdomen pinkish with slightly darker band on the 

 middle of the dorsal side. A single respiratory filament occurs on each 

 side of the first segment. A pair of filaments occur in similar position 

 on the second, third and fourth segments. The hairy tibial spurs on the 

 legs, are 3, 4, 4 on the first, second and third pairs respectively. The 

 body ends in two blunt, hairy, appendages of two lobes each. Hooks 

 pointing backward occur in two rows on the dorsal side of the third, 

 fourth, fifth, sixth and seventh segments at the anterior edge. Two 

 plates with spikes pointing forward are found at the posterior edge of the 

 fifth segment. 



Eggs. Eggs of this species laid by an adult which was bred, are 

 shown in plate 13, figure 11. 



Hydropsy che species? (near phalerata Hag.) 



Plate 15, figures 1-4, 7 



Habitat. Larvae and pupae found in rapid currents in Little Clear 

 creek. Adults settled in great numbers on the hatchery windows. 



Occurrence. Abundant throughout the period. 



Case. No larval case, only strands of silk between the rocks. Pupal 

 case (pi. 15, fig. 4) of rather coarse stones fastened to larger stones or 

 other supports. 



Larva. (PI. 15, fig. 3) Length 16 mm. Width 3 mm. Head 

 brownish yellow. A dark brown patch in front, and in the center of this, 

 a horseshoe shaped, yellow mark opening posteriorly. Labium almost 

 black. Prothorax brownish yellow margined with black. Mesothorax 

 same except that the black margin is not complete. Instead, there is a 

 semicircular black Hne at posterior margin. Mesothorax is similar with 

 black spot instead of the semicircle. Legs yellow with white spots on 

 coxa and femur. Abdomen white, the dorsal side thickly set with blunt, 

 brown hairs. No tubercles on the first segment. Filaments occur only 

 on the ventral side. Thev are set in two rows on the mesothorax, the 



