280 Journal New York Entomological Society. C'^^o'- xxiv. 



5. Projapygoides (Prodicellura). — Styli and segmented cerci 

 present, but median unpaired caudal filament wanting. Mouthparts 

 retracted, and mandibles similar to those of the preceding group. 

 Maxillary palpi two-segmented (?). Antennas rather robust, or less 

 slender than in preceding group. Eyes and postantennal organ 

 usually wanting. Transverse occipital suture not distinct, and occi- 

 pital region reduced. Body not scaled. Body composed of eleven 

 distinct segments, the eleventh being reduced and covered by the 

 tergum of the tenth. First abdominal segment with a pair of some- 

 what cylindrical or conical processes, one on each side of the mid- 

 ventral line : the first abdominal segment is also provided with a pair 

 of styli (absent in the preceding group) which are somewhat long 

 and cylindrical. Styli occur on abdominal segments one to seven 

 inclusive. Two rather short, robust cerci composed of fewer seg- 

 ments (about six in all) than in the preceding group, occur in these 

 insects, and the terminal segment of each cercus bears an opening at 

 the tip for the discharge of glands. Anal laminae distinct in adults. 

 Seven abdominal ganglia. Seven pairs of spiracles in abdominal 

 region. Malpighian tubules represented by five or six small short 

 tubes or papillae. Ovarioles present. Heart with nine pairs of ostia. 

 Foregut extends posteriorly to the fifth abdominal segment. This 

 group contains the family Projapygiidse. Its position is intermediate 

 between the Campodeidse and Japygidae, the type of mandibles, the 

 segmented cerci, the presence of vestigeal malpighian tubules, etc., 

 being Campodeidan characters; but the general character of the body 

 (and its appendages, other than the cerci) is much more like that 

 of the Japygidae than the Campodeidae, and if the group is to be 

 regarded as a suborder rather than as an order, it should be placed 

 with the Japygidae in the order Dicellura, instead of with the Cam- 

 podeidae in the order Rhabdura — as Brues and Melander have done ! 



6. Japygoides (Dicellura). — Styli present, ' but the cerci have 

 become modified to form a pair of unsegmented terminal forceps- 

 like structures. Median terminal caudal filament wanting. Mouth- 

 parts retracted. Mandibles with dentate apex, but the dentate plate 

 found in the Projapygidce and Campodeidae is absent. Maxillary 

 palpi two-segmented. Antennae rather robust or less slender than in 

 Campodeidae. Eyes and postantennal organ usually absent. Occi- 

 pital suture not distinct, and occipital region reduced. Body not 



