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Head without protuberances ; antennae extending beyond base of 

 wing; palpi straight, directed laterad; wings extending slightly beyond 

 base of fourth abdominal segment; fore tarsi extending to base of 

 fifth, mid pair to base of seventh, hind pair to base of eighth. Ab- 

 domen glabrous ; 6 pairs of well-developed lateral spiracles present, 

 basal pair rudimentary. 



Described from a number of specimens obtained by myself at 

 White Heath, Savoy, and Urbana, 111., in June, July, and September, 

 1915-16. 



Exechia Winnertz 



As I have but one species of this genus represented by other than 

 the imaginal stage, the generalization for the larval and pupal stages 

 may not apply to all species of the genus. 



GENERIC CHARACTERS 



Larva. — Head not much longer than broad, posterior margin with 

 a central and medio-lateral excision on dorsum ; central plate tapered 

 gradually from before middle, ending in a rounded point at posterior 

 margin; antennae sessile; pellucid spot below antennae distinct; 

 mandibles rounded, with numerous short teeth ; maxillae normal, their 

 palpi larger than those of Leia; ventral excision as in that genus. 

 Body with locomotor organs on venter, each consisting of 2 transverse 

 series of black spines; spiracles conspicuous, the prothoracic pair 

 slightly elevated and with 4 openings. 



Pupa. — Similar to the pupa of Leia, but differing in the length of 

 the legs. 



HABITS OF LARVAE 



The larvae are fungivorous, feeding usually in the stems of mush- 

 rooms. They commonly line their burrows in the stems with a 

 slimy fluid similar to that excreted by Leia. Pupation takes place in 

 the burrows. 



The species which I have reared, or attempted to rear, are often 

 killed by a hymenopterous parasite when on the point of pupation. 



HABITS OF IMAGINES 



The species frequent woods, especially the denser parts, and may 

 often be taken in great numbers about fungi. They very often occur 



