244 NEW YORK STATE MUSEUM 
The nymphs found in Little Clear creek, where most abun- 
dant, were often deeply incrusted with a reddish brown 
deposit, and in July many of them were further decorated with 
a number of living red hydras attached to their backs, as awe 
on plate 138, figure 5. 
Argia tibialis Rambur 
Plate 15, a 
1842 Platycenemis tibialis Rambur, Ins. Neur. p.241 
1861 Trichonemis tibialis Hagen, Synopsis Neur. N. Am. p.72 
1865 Argia tibialis Selys, Acad. Belg. Bul. (2) 20:413 
1893 Argia tibialis Calvert, Am. Ent. Soc. Trans. 20:233 
This species is not yet known from New York State, but it has 
been reported from Pennsylvania, and may be found here also. 
Its range extends westward and southward to Illinois and 
‘Texas. I have a number of specimens that were bred by Mr 
F. G. Schaupp at Shovel Mount Tex., between Aug. 13 and Aug. 
18, 1898. From the cast skins, and from a few additional speci- 
mens apparently belonging to the same species, I have drawn 
the following brief descriptive characters. 
Nymph. Length 12mm, gills 4.5mm additional, abdomen 8mm; 
width of head 3.2mm. Color greenish or brownish, marked with 
darker in a double row of elongate spots on the dorsum of the 
abdomen, and in two faint transverse bands on each femur. 
Structurally it differs from the preceding species only in the 
following points: there are four lateral setae on the labium, in © 
a regular series; the end hook of the lateral lobe is not sepa- 
rated from the inner margin by an incision; the tooth on the end 
above the end hook is smooth and not denticulated superiorly; 
the gills are ovoid oblong, widest just beyond the middle and 
rather abruptly rounded on the tip, and they show hardly any 
area of lighter color apically. Antennae six jointed; other char- 
acters as in the preceding. 
Argia bipunctulata Hagen 
1861 Agrion bipunctulatum Hagen, Synopsis Neur. N. Am. p.90 
1865 Argia bipunctulata Selys, Acad. Belg. Bul. (2) 20:415 
1893 Argia bipunectulata Calvert, Am. Ent. Soc. Trans. 20:234 
This species is recorded from New Jersey, but is not yet 
known from New York State. Its nymph is still unknown. 
