I. TRÄGÅRDH, DISCOMEGISTUS NOV. GEN. 



15 



the smallest, being only half as lorig and stout as the 2nd 

 one; it is inserted on a low, rounded tubercle at the base of 

 the maxillary lobes, at their median side; the 2nd one is 

 slightly S-shaped: the 3rd one was broken off; the posterior 

 one is slightly shorter than the 2nd one, but perfectly straigth 

 and stouter. 



The maxillary lobes are thin and soft, slightly bent to- 

 wards one another and nearly twice as iong as they are wide 



Hypostoma X 609. 



at the base. Along their median edge there is attached a 

 large, exceedingly thin, rounded-triangular membrane, the 

 edge of which has sharp, closely set teeth anteriorly, which 

 diminish successively backwards along the median edge. 



The maxillary plates are very short, triangulär, not pro- 

 jecting beyond the tops of the max. lobes; on the externa! 

 side of them we notice a pair of narrow, lanceolate, finely 

 hairy appendages. 



On tlie systematic position of L>iscotne(fistus, with notes 

 on the Heterozerconinae. 



The genus Heterzercon was established in 1888 by Berlese 

 [1, p. 206 — 7] on a single female, found by A. Balzan at 

 Måtto Grosso. 



