257 



POLYIvEPTA LEPTOG ASTER Willliertz 

 Polylepta leptogaster Winnertz, Verh. zool.-bot. Ges., Vol. 13, p. 746. Imago. (1863) 



Larva. — Length, io mm. Body worm-like, long and slender, in 

 the middle cylindrical, tapering towards extremities. Functional 

 spiracles present on prothorax only, the tracheal trunks confined to the 

 first 2 thoracic segments, terminating on each side at posterior mar- 

 gin in 2 closed functionless spiracles. Head elongate (PI. XXXVITI, 

 Fig. 3) ; antennal sockets surrounded by a chitinized dark band, the 

 antennae rudimentary; maxillary palpi not protruded as figured by 

 Osten Sacken for Sciopkila, their apices extending very slightly be- 

 yond apices of the serrated maxillae ; mandible with 5 teeth, the upper 

 one strong, the others becoming progressively weaker to lower one 

 (PI. XXXVII, Fig. 16) ; median opening in posterior half of ventral 

 surface of head cordiform. Abdominal locomotor organs very weak. 



Pupa. — Undescribed. 



This species has been recorded from New Hampshire and Indiana, 

 Schmitz's specimens were obtained in a cave in Europe. 



Johannsen records 4 species of the genus from North America. 



Mycoma brevivittata Coquillett 



Sciophila brevivittata Coquillett, Jour. N. Y. Ent. Soc, Vol. 13, 1905, p. 67. 

 Mycoma brevivittata (Coquillett) Johannsen, Bull. 180, Maine Agr. Exper. Sta- 

 tion, p. 176. (1910) 



Larva (exuvium). — Head as in Figures 1 and 4, Plate XXXVIII ; 

 maxillary palpi short, not surpassing the apices of maxillae ; antennae 

 not protruded, the antennal socket surrounded by a black band ; 

 mandibles with a double series of teeth, which are very unequal in size 

 (PI. XXXVII, Fig. 17) ; median dorsal sclerite of head tapering to 

 a point posteriorly. Tracheal trunks large; prothoracic spiracles dis- 

 tinct; no other spiracles discernible in specimen, but they are rarely 

 visible in exuvia though they may be present in the larva ; locomotor 

 spinules not distinguishable. 



Pupa (PI. XXXVII, Fig. 1 8). —Length, 4-5 mm. Brown, slight- 

 ly shining; enclosed in a silken web. 



Stout ; anterior margin of thorax vertical, head not extending to 

 anterior margin of thorax; antennae curved over upper margin of 

 eyes and extending to middle of wing, their bases rounded in profile; 

 palpi not extending to upper eye-margin. Thoracic respiratory organs 

 elevated; surface of thorax with short sparse setulae; wings, antennae, 



