rilOCEKDIXOS OF THE XATIOXAL MUSEVM. 69 



Genus CHOM ATOBIUS, Humbert and Saussure. 

 ('Iiuiiuiloh'ni.s, Hr.Air.KKi- and Saussure, Revue et Mag. il. Zool., p. 205, 1870. 

 Ty2K\ — Choni at obi lis ni exicamis ( Saussure) . ' 

 r>isfrihi(ti<»i. — Mexico. 



DISARGIDiE, new family. 



Auteima? tilifonii or crassate, not attenuate; frontal lamina distinct 

 (or coalesced?); cepbalic lamina concealing the prehensors; prebasal 

 lamina obsolete; basal plate broad; mouth parts unknown; prelien- 

 sorial sternum very broad; supra scutella wanting; ventral pores in 

 two areas, a. circular anterior and a broad, transverse posterior; anal 

 pleura inflated, with uumerous pores; anal pores wanting; genital 

 palpi two-jointed; anal legs five or six jointed, with a claw. I'airs of 

 legs, r)<J-99. 



DISARGUS, new genus. 



Type. — Unndiitiirium (?) striation (Pocock).- 

 Distrihiition. — Madras. 



Genus HIMANTOSOMA, Pocock. 

 Himantosoma, Pocock, Ann. d. Mus. Civ. di Gcnova, 2 ser., X, p. 428, 1891. 



Type. — HimantoHohia typicum, Pocock. 



Disiribution. — Mergui Archipelago, Burmah. 



Besides these genera there are i)robab]y two or more others in the 

 oriental region represented by species described by Meinert and Pocock 

 under Himantarium, but evidently very little related to gabrieJis. The 

 characters now known are not sufficient, however, to give inu(;h base 

 for an estimate of affinities. The present family has been recognized 

 on account of the unique combination of characters which make affini- 

 ties with the other families very improbable, though much must depend 

 on the mouth parts. 



BALLOPHILIDiE, new family. 



Aiiteniue geniculate, subclavate; frontal lamina not distinct; ce- 

 phalic lamina concealing the prehensors; prebasal lamina obsolete; 

 basal very broad; labrum entire, not chitinous; mandibles with one 

 pectinate and one dentate lamella; labial sternum entire, simple; labial 

 palpus two-jointed; interior labial jirocess distinct; inaxillarj^ sternum 

 divided; claw of maxillary palpus excavate, the margin pectinate; 

 prehensorial sternum very broad, chitinous lines wanting; suprascu- 

 tella wanting; ventral j)ores in an oval posterior area, consisting of a 

 raised, perforated, chitinous plate; anal pleurie not inflated, Avith two 



'Essai d'une Fanue d. Myr. d. Mex., p. 1.32, 1860. 

 -Ann. Mag. Nat. Hist., (6) V, p. 248, pi. xii. fig. 4. 



