564 NEW YORK STATE MUSEUM 



/ Tubercles low and broad, pronotum quadrilateral, claws with two 



bnsal hooks S eric os tora a, Oecismus, Notidobia 



ff Tubercles conicalj pronotum transversely elliptical 



Goer a, Silo, Lithax 

 ee No dorsal tubercle 

 / No lateral tubercles 



Brachycentrus, Oligopletrum, Micrasema 

 ff Lateral tubercles present 



Crunoecia, Lep id ost oma, Lasiocephala 

 Hh Hiud legs more than twice as long as the first pair, abdominal constrictions 



slight, cylindric case of sand and small stones Leptoceridae 



aa Larva campodeiform, i. e. with head in line with the main axis of the body, 

 tubercles and lateral fringe wanting, gill filaments, when present, branched 

 & Abdomen little, if any, thicker than the thorax 

 c Third pair of legs about the same length as first pair, no portable larval 



case Hydropsychidae 



CG Third pair of legs a little longer than the first. No larval cases 



Rhy acop h ilid ae 



&& Abdomen much thicker than the thorax: case kidney shaped, of small 



stones, or flat and parchment-like Hydroptilidae 



SPECIES REARED AT SARANAC INN 



Molanna cinerea Hagen 



Plate 13, figures 1-6 

 1861 Molanna cinerea Hagen, Synopsis Neur. N. Am. p. 276 

 1892 Molanna cinerea Banks, Am. ent. soc. Trans. 19 : 366 (listed) 



Habitat. Larvae and pupae were found in great abundance on sand 

 bottoms with little or no vegetation. Adults rest on vegetation or other 

 support near the place of emergence, their appearance, specially their 

 position (pi. 13, fig. 5), with antennae laid flat on support, wings and 

 abdomen elevated, causing them to be easily mistaken for small snags. 



Occurrence. Abundant throughout the period of work. 



Case. (PI. 13, fig. 6) Flat case of sand and very fine stones. 

 Rounded at both ends. Forward end extended on dorsal side, forming 

 a protection to the larva even when reaching out of its case. Length 20 

 mm. Greatest width of 10 mm near the forward end. 



Larva. (PI. 13, fig. 1-2) Length 12 mm. Width 2 mm. The head, 

 prothorax, and mesothorax are fight brown or yellowish. Metathorax and 

 abdomen are light green . A black Y-shaped line extends over the head and 

 prothorax, the arms of the Y running from the corners of the mouth and 

 joining at the rear of the head. The pedicel of the Y extends over the 



