BAGWORM MOTHS OF THE WESTERN HEMISPHERE 103 



8b. Wings with more contrasting pattern and more lieavily scaled (fig. 50, 

 etc.) ; expanse 28-52 mm. 

 9a. Arcliitectiire of larval case consisting of dense covering of twigs 

 applied longitudinally (figs. 101, 103, etc.); wings of male rela- 

 tively broad; lighter areas of wing yellowish brown (0. toivn- 

 sendi) . 

 10a. Forewings with discal cell only partially darkened (fig. 50). 



O.t. townsendi and O.t. deudrokomos 

 10b. Forewings with cell completely filled with dark scales (fig. 51). 



O.t. niexicamss 



9b. Larval case (figs. 108, 112, etc.) with heavy thatching of short twigs 



arranged in circular pattern around case; wings comparatively 



slenderer with lighter areas usually of brownish to fuscous color. 



11a. Exterior of larval case almost invariably without layer of silk 



covering twigs; primaries with lower margin of dark apical 



area straight and usually continuing without interruption 



into discal cell (fig. 52) ; wing expanse 28-37 mm. 



50. O. abbotii 



lib. Exterior of case with firm sheet of silk covering underlying 



structure of twigs ; primaries with lower margin of dark apical 



area curved and indented at point of juncture with lower 



margin of cell (fig. 55) ; wing expanse 35-52 mm . . 51. O. kirbyi 



ParaoiketicuSf new subgenus 



Type of subgenus.^ — Oiketicus geyeri Berg, 1877. 



Male. — Antenna! pectinations gradually decreasing in length to 

 tip or strongly biserrate in outer fourth. Prothoracic leg (figs. 184, 

 186) with tibia short, tarsus exceeding it in length; firet tarsal segment 

 longer than second, sometimes over 2x as long; epiphysis approximat- 

 ing tibia in length, arising near base, reaching or slightly surpassing 

 distal end. Meso thoracic leg with tibia and tarsus nearly equal. 

 Metathoracic leg with femur dilated, sometimes extremely so. 



Wings usually uniformly and thinly scaled, unicolorous, or essentiallj'^ 

 lacking in scales {0. zihuatanejensis). Forewing (fig. 146) with spurs 

 from 2A to hiudmargin absent. Outer margin of secondaries evenly 

 rounded or slightly sinuated. 



Male genitalia. — Relatively shorter, broader than other subgenus. 

 Saccus not as long in proportion to total length of genitalia. Aedeagus 

 comparatively shorter, stouter; gradually enlarging toward base. 



Case. — Usually evenly cylindrical, gradually tapering toward 

 posterior end; broadly fusiform in 0. bergii; surface usually smooth, 

 uniform, little or no extraneous vegetable or mineral matter attached; 

 usually light greyish to brownish color ; structure a comparatively hard, 

 firmly packed silk in all species except in male cases of 0. bergii in 

 which walls are rather papery. 



Discussion. — This subgroup could be considered distinct enough 

 almost to merit a separate generic status if it were not for certain 



