THE MYUIAPODA OF NORTH AMERICA. 139 



11. S 



1833. Spirostreptits Hrandt. 15ull. > Q oc. imp. Nat. Moscoii, 203 (xrhiif and 



1X33. s'y/tYfir//r/,\/,(.s- r.randt. Imll.Sor. imp. \at. Mosroii. I'd I ( acn /in/i/nlii.^ ). 



1S33. Ny'"''V" " s I'l'aiidt. Hull. Soc. imp. Nat. Mosoou, L'Ol \jim-Iu-ri). 



isll. \inl,i/ii/i/i' Brandt. Ri-cncil !U ( jiirnuii .s. xfhuc, iituloiiiiii, etc.). 



l'41. (>/!<}iit<>i>t/i/<' I'.raiidt. KVcuril, 1 10 ( Mcil8jc>idatu8,flavot(sniatu8, </ra<'Hir<>niis, etc. ). 



Brandt in his subdivision of Spirostreptus <lid not retain tin- original 

 name of the genus lor that division of it which contained the original 

 type of the gen us. Now, as Wodopy ge contains ihetyge of Spirostrepfais, 

 the name tipiroNtrcirtuN must be used in place of Xodopyyc. SpiroptcHx is 

 also identical with .s f y"'''" iS '/'V^"- sl ) Jln( l as ^' s types belong to his subgenns 

 Or/ox topy</c, it must ^^be used in place of Odontopyyt' on account of its 

 priority. 



12. P.KKOMOPUS. 



1SS1. Pirromopnx Ka.rscli. Einijjo IKMIC dip. Myr. 1'er. Mus. . 12 (lysiopetalinus Spiro 



linhix a>if/nxti<'t'i>S Wood). 



This genus has been considered by Latzel as identical with Jitliis. but 

 the following from Dr. Karsch's generic description has led me to be 

 lieve that it should be recognized as a valid genus: 



"Occllix ociilorinn .svr/V/>/(s' nfrinque 3 t/tittmii ^v<-u.vrrr.s'/.v <-<>t}>ofiitix 

 . . . antennis ped-ibusque l<i<ii*xhnJK . . . coin in untre appcmli 

 cibus crassis haud pediformibus sat longis instriicto .... mclntnr- 

 .s'/.s }><'<! ttvi pclnut mini it IN." 



None of the species of Jiilim ever attain a length of over 100 millime- 

 ters, while those of I'd'roim^nin are from 150 to 10.") millimeters long. 



So far the mouth parts and gnathochilarium. \ Inch always present 

 the best generic characters, have not been examined. 



13. TRACIIY.MI.I s. 



1864. TriH'liii/iiliix Peters Monatsher. Kon. JUTUSS. Akad. Wiss., r>17 (cri/liniicus). 

 1SS1. Truc'ini'ndnx Lat/cl. Myr. Ost.-Ungar. Mon., 11, ">(! (eincud.). 



This genns is closely related to Acdnthiulit*, but is easily separated 

 by the following characters : Ocelli in a single series. Antenna 1 and 

 le-s moderately long. Posterior border of first segment carinated, 

 sides not produced as in A can thin Inn. Other segments, except the last, 

 with 13 to L'l rows of canine. 



First, second, and third segments each with one pair of legs, fourth, 

 footless. Peters 1 orthography Tn(-cJiyji<li<)i ought to be used instead of 

 Tr/icJii/iiihin, which emendation lias been used by later authors. The 

 same must be the rule with Actnithinlnn and 



II. AcANTinri.rs. 

 1S17. .IctiHlliiiihiK (I.Tvais. Ann. Sci. Na I .. 70 i hlninrillin. 



This genus was first recognized by (lervais as a siibgenns of J 

 but as it bears no relation to >/nliiN it has been raised l>y later authors 

 to a generic rank. 



