*COMMENT ~ Trichoptera: Character notes. 
 
*CHARACTER NOTES
#7. While some species of Trichoptera fly in sunshine, others are nocturnal and 
are attracted to light. To test the possibility that the ocelli function for navigation, 
it would be relevant to know whether the variation regarding their presence 
(which is variable at family level and even in some genera) is correlated 
with flight times. The ecological data available to LW, though consistent with 
this hypothesis, are inadequate.
#11. This pseudo-character, representing several potentially useful
characters, is employed with minor variations of wording at an important,
early stage in three influential keys to the families: one for British
Trichoptera (Mosely, 1939), one for Australasia (Mosely and Kimmins, 1953),
one at world level (Imms, 1957), and another for Australia (Riek, 1970).
Comparative data are not provided in family descriptions, nor is the
generally very long, flexible, articulated, annulated (or whatever) type of
terminal maxillary palp segment discussed or illustrated adequately.
Furthermore, although the \i{}Philopotamidae\i0{} are always the first family
keyed out on the very long, flexible, articulated branch, this is clearly
erroneous for \i{}Chimarra marginata\i0{}, which is the only British
representative on which direct information is to hand (see Curtiss
illustrated description; cf. also the Mosely and Kimmins family description,
which hardly conforms in this respect with their key). Persistent reference to
the same inadequately described structure, and repetition of the same mistake
in keys for different regions, does not inspire confidence in the data
compiled here from the same sources. 
#35. In \i{}campodeoid larvae\i0{}, which seldom construct portable cases, the
body is dorsiventrally compressed, and the head is not or only slightly
inclined; there is no lateral line, abdominal papillae are lacking, and
tracheal gills are often absent. \par{}In the \i{}eruciform type\i0{}, which
is associated mainly with portable cases, the body is cylindrical, and the
head is markedly inclined; a lateral line is present; retractile papillae
(usually one dorsal and two lateral), apparently concerned with maintaining
the position of the larva in its case and permitting an even flow of water,
are present on the first abdominal segment; and simple filamentous or branched
tracheal gills are present on the abdominal segments. 
#41. The numbers of sclerites recorded for divided mesonota are exclusive of
the (lateral) pleurites, which can be seen in some of the illustrations. 
#43. The numbers of sclerites recorded for divided metanota are exclusive of
the (lateral) pleurites, which can be seen in some of the illustrations. 
#46. In \i{}campodeoid larvae\i0{}, which seldom construct portable cases, the
body is dorsiventrally compressed, and the head is not or only slightly
inclined; there is no lateral line, abdominal papillae are lacking, and
tracheal gills are often absent. \par{}In the \i{}eruciform type\i0{}, which
is associated mainly with portable cases, the body is cylindrical, and the
head is markedly inclined; a lateral line is present; \i{}retractile papillae
(usually one dorsal and two lateral), apparently concerned with maintaining
the position of the larva in its case and permitting an even flow of water,
are present on the first abdominal segment\i0{}; and simple filamentous or
branched tracheal gills are present on the abdominal segments. 
 
