Typua Insects: THER EcoLtogicaL RELATIONSHIPS 479 
the third abdominal segment. Femur of prothoracic leg not visible. Prothoracic tibia and 
tarsi prominent, reaching down two-thirds the length of the maxillae. Mesothoracic legs — 
extending to the tips of the maxillae. Metathoracie legs invisible. Antennae reaching 
almost to the tips of the maxillae. Segments 4, 5, and 6 of the abdomen crossed dorsally by 
a transverse line of tubercles; the surface in front of the ridge coarsely punctate, but the 
part of the segment caudad of the ridge very finely punctate. On the ventral surface these 
transverse ridges occurring on segments 5, 6, and 7. Cremaster about as wide as it is long, 
somewhat flattened dorso-ventrally, very rugose, and bearing four short setae of equal length. 
Spiracles on the eighth abdominal segment dorsad. Female with two genital orifices. The 
peculiar sculpturing of the larva carried over and showing somewhat in the pupa. 
The adult (Plate XLI, 26) 
‘Length of body of female, 26 mm. Expanse of wings 54mm. The original description by 
Walker (1865 :438) is as follows: 
Cinereous brown....Antennae moderately pectinated in the male, slightly pectinated in 
the female... .Femora and tibia fringed; spurs moderately long. Fore wings with a dark 
brown oblique stripe, which extends from the base of the interior border to the tip of the 
wing, and is very diffuse on the outer side; an oblique fusiform pale cinereous ringlet; another 
ringlet of like shape and hue, longitudinal, nearer the base, much smaller than the first and 
often obsolete; two submarginal oblique lines of blackish lunules: exterior border almost 
straight, rather oblique. Hind wings with a black oblique spot in the disk beneath. 
Nonagria oblonga Grote 
Nonagria oblonga Grote, a moth which also belongs to the family 
Noctuidae, has been reported by various authors as boring in the stems 
of Typha latifolia. Walton (1908) has described to some extent the 
habits of the later larval stages and has figured the full-grown larva, the 
pupa, and the adult. The writer has found the species to be common 
on Typha latifolia near Lawrence, Kansas, and in the following places 
around Ithaca, New York: Vanishing Brook, Cascadilla Creek, Bool’s 
Back Water, Renwick Marsh, and Michigan Hollow. 
Life history and habits 
Nonagria oblonga Grote apparently produces only one generation a year. 
Egg-laying.— The writer has been unable to find the eggs of this species, 
although the work of the larvae, from the first instar on, has been observed 
for three seasons, two seasons around Ithaca and one season in Kansas. 
The young larvae may be found just as soon as the cat-tail leaves appear 
above the surface of the ground. In Kansas, on April 20, 1917, when the 
leaves of the cat-tail were not more than four inches above the surface 
of the ground, the larvae were found at work in the tips of the leaves. 
