253 



low antennae distinct ; median dorsal sclerite pointed posteriorly. 

 Thorax and abdomen without locomotor spinules; thoracic and ab- 

 dominal spiracles distinct, the openings blackened. 



Pupa. — Anterior margin of thorax declivitous; thoracic spiracles 

 not elevated ; antennae elongate, curved well over eye and ending 

 about middle of wing; fore, mid, and hind legs ending at different 

 distances from apices of wings ; abdomen without noticeable armature. 



HABITS OF I^ARVAK 



The larva lives in a loose slimy web on damp rotten wood or on 

 fungus, and the pupa is found suspended in the threads. The larvae 

 are very active, moving within the slimy tubular thread, either for- 

 ward or backward, with great facility, and in their behavior resem- 

 bling some tortricid larvae of the Lepidoptera. 



HABITS OF IMAGINES 



The imagines closely resemble those of Mycetophila and are found 

 in the same situations — sometimes on flowers, on windows, or under 

 logs, and not uncommonly at lights. I have found L. oblectabilis in 

 hundreds on the walls and windows of the Natural History Building 

 here in July and August. 



Lfia obi^fctabius Loew 



Glaphyroptera oblectabilis Loew, Berl. Ent. Zeitschr., 1869, p. 146. 



Larva. — Length, 11-13 mm. White, semitransparent; head glos- 

 sy black. 



Median dorsal sclerite of head tapering gradually from before 

 middle, ending in an acute point at posterior margin (PI. XXXVII, 

 Fig. I ) ; antennae not elevated, represented by rounded, pale, mem- 

 branous areas ; pellucid spot below antermae large and rounded ; 

 mandibles with 3 large teeth and 2 small ones on outer margin, and 

 3 or 4 on inner surface (PI. XXXVII, Fig. 10) ; maxillae serrate on 

 inner margin, the palpi not well-developed (Fig. 13) ; ventral surface 

 of head as in Figure 14 of plate mentioned, the posterior excision 

 cordiform; hypopharynx as in Figure 8. Prothoracic and abdominal 

 spiracles small, the latter especially so. Abdomen glabrous, no loco- 

 motor organs distinguishable. 



Pupa (PI. XXXVII, Fig. 5).— Length, 5-6.5 mm. White, be- 

 coming darker and showing the markings of the imago as the latter 

 nears emergence. 



