156 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



Family II. JULIDJE. 



Analysis of the sub fa milieu of Jidida-. 



a. Gnathochilarium stipes separated by the promentum ; mentum entire, touching 



prouientum; spatula absent. 



b. None of the anterior segments apodous, 1, 2, 3, 4 each with a pair of legs; 

 gnathochilarium stipes smaller than promentum; cardo absent; mau- 



dibulary combs 10 (9); antenme short and thick SPIROBOLIN.E. V. 



bb. Fourth segment apodous, 1, 2, and 3 (except in (llyplnultis) each with a single 

 pair of legs; gnathochilarium stipes larger than promentum; cardo 

 present; antenna' not short and thick. 



c. Promentum entire; mandibulary combs 8-10 SPIROSTREPTIN.E. VI. 



cr. Promeutum divided; mandibulary combs (5) 6-7 CAMBALIN.E. VII. 



aa. GnathocMlarium stipes not separated by the promentum; mentum bipartite, 

 not touching the promentum, which is small and separate 1 from the 

 mentum by the stipes; spatula present; third segment apodous. 

 d. Mandibular combs 10 (9) ; second pair of legs dwarfed; $ promentum, first 

 segment and first pair of legs (6-jointedj very large. 



PARAJl'LIN.E. VIII. 



dd. Mandibular combs 4. 



e. Only the ventral plates of the first and second segments free ; $ genital 



ducts opening through the cox;e of second pair of legs.. .Ji'LiN/E. IX. 

 ee. All the ventral plates free; $ genital ducts not opening through the 



coxoi of second pair of legs NEMASOMIN/E. X. 



Subfamily V. SPIROBOLIN^;. 



This subfamily contains the genus Spirobolus* Brandt. 



Subfamily VI. SPIROSTREPTINJE. 



Anali/8ix of Ike (jenera of Spirostreptince. 



a. Segments without carime or spinelike warts. 



b. Repugnatorial pores beginning on the sixth segment; niandibnlar combs 10. 



SPIUOSTREPTUS t Brandt. 

 bb. Repugnatorial pores beginning 011 the fifth segment; mandibular combs 8. 



ALLOPORUS Porath. 

 aa. Segments with carinn 1 or spinelike warts. 



c. Third segment with a single pair of legs. 



d. Ocelli in a single series; segments Avith 20 rows of spinelike warts, first 



dorsal plate carinated TRACHY.JULUS Peters. 



dd. Ocelli in about 9 rows ; segments with about 8 rows of spinelike warts, 



first dorsal plate smooth ACANTHI n.rs (iervais. 



or. Third segment with two pairs of legs; ocelli in many series; segments with 

 10-11 rows of spinelike warts, first carinated GLYPHIULUS Gervais. 



* Analysis of subgeiiera of Xpirobolios. 



a. Dorsal part of segments without scobiua SPIROBOLUS, s. xtr. 



(in. Dorsal part of all or nearly all the segments with scobiua RHINOCRINTS. 



t.fwrt/.i/s/s of siibgenera of ^iiiroxtreptus. 



a. Anal valves without a sharp or blunt s]iine which ])asses beyond anal segment. 



Si'iimsTKEPTrs, s. sir. 

 aa. Anal valves with a sharp or blunt spine which passes beyond anal valves. 



The subgenns Xmlopyge Brandt, according to the rules of nomenclature, must give 

 way to SpiroNtn'i>tn*. 



ODONTOPYGE Brandt. 



