NORTH AMERICAN CADDIS-FLY LARVE. 
LIMNOPHILID2 WITH GILLS ARISING SINGLY. 
EAcH SIDE ea 
ea BRowN MARKS PROTHORACIC | OF Meso- | SPACING ee 
NAME ON FRONS HorN THRacic | Humps |, 5 IRST 
Hint BDOMINAL 
SEGMENT 
Muscle-attach- Absent Margins All With pair 
NEOPHYLAX ment marks only only deep | present | of thumb- 
CONCINNUS black like pro- 
jections 
F Muscle-attach- Absent Margins | All Without 
NEOPHYLAX ment marks only only deep | present projec- 
AUTOMNUS black tions 
Muscle-attach- Present Margins Dorsal Without 
ARCTOECIA ment marks only only deep | hump projec- 
MEDIALIS black absent, tions 
lateral 
humps 
present 
Mottling besides Present A deep All Without 
ASTENOPHYLAX muscle attach- black isol- | present projec- 
ARGUS ment marks ated spot tions 
in each 
outer 
caudal 
angle 
Mottling besides Present Margins All Without 
HALESUS muscle-attach- only deep | present, projec- 
GUTTIFER ment marks black dorsal tions 
hump 
nipple-like 
Mottling besides Present Margins Flattened | Without 
PyYCNOPSYCHE muscle-attach- only deep | or slightly | projec- 
SCABRIPENNIS ment marks black rounded, | tions 
Dorsal 
hump not 
nipple-like 
Limnophilide with gills arising in tufts of two or more. Without dark colored 
longitudinal mark on frons. 
SET4& ON CAUDAL HALF OF 1ST AB- 
NAME COLOR PATTERN OF FRONS| DOMINAL SEGMENT, VENTRAL SIDE 
Entirely light, except few} Scattered, not arising in two clusters 
PLATYPHYLAX DESIGNATUS & ! 
brown spots behind middle of segment 
CHILOSTIGMA DIFFICILE Uniformly brown Scattered, not arising in two clusters 
behind middle of segment. 
PLATYCENTROPUS MACULI-| Entirely black, except Gathered in two groups. 
PENNIS caudal margin and few 
brown spots 
LIMNOPHILUS SUBMONILI-| Light, except caudal mar-| Scattered, not arising in two clusters 
FER gin and sparse brown behind middle of segment. 
mottlings. 
42 
