170 BILLETIN 16, UNITED STATES NATloNAI. Ml SECNf. 



.iMiilyHtH of Ihr MjuritM iif ThfotopM. 



o. hVnioru of anal I<-;;h niiarm<-<l ; i.iin<w>r tin- tibial or tarsnl JointH arino«l nbovi>; all 

 tarsal joints ariiUMl iMni-ath, fxcrjit tin- last t\vo Postk rs. — 2 



aa. FeniiirH of anal U'K>* with onn or two HpiiirH at tb<>ir Hnpi-rior interior anM;lt' ; tibiu>, 

 •'Xc«'pt tlm 'ast thr«M-, urnioil almvc; all tarn .1 jnintH ("xcritt tlu> last twoarin«'«l 

 ubn\«> un<l brneuth; tii'Mt tarnal joint of first pair of Ic^s iinartnt'd b«;- 

 nt'utli 8l'lMCAUUA."-3 



2. Theatops posticus. 



1821. — CryptopH pontica Say. Jonrn. Afail. Nat. Sri. I'hila., 112 (Georgia and Flt>riaa)\ 



Say, Anior. Knt.,21, \K2'2; (iirvais, Ann. Sci. Nat., .">1, IHM ; N«-wport, Ann. 



& Majt. Zool., 1(H), 1H41; Koch, Syst. Myr., 175, 1K17; (iervais. Apt«^re«, iv, 



LfU, 1H17. 

 1844. — TlnaltipH pontica Siiw\>ori. Trans. Linn. Soc, 110, IHll; Ni-wport, (.'at. Myr, 



Hrit. Mm., 71, 185fi; Wood, .Fonrn. i'hila. At-atl. Nat. S«i.. 37, 1H62: W<»oil, 



TranH. Auier. Thil. Soc, 171. ixtiTi; KohlrauH«'h, Arcliiv Natur^'., i>3, 1881; 



Pocock, Ann. & Majf. Nat. lliHt., -JHi), IHHH. 

 18<52. — Opinlhtmetj(i poHlioa Wood, .louni. Ai-ad. Nat. Sci. Ph'la.. U5 ((iolilMboro, X. T.) ; 



Wood, Trans. Amer. Phil. Soc, UJ!*. 18H5; Kohlrausch Archiv Naturjj., 



130, IHHl; rndcrwood. Knt. Annr., tJJ, 1S87. 

 1886. — OpiHthemiyti craHHipiM .Meim-rt. Pror. Ann-r. I'liil. Soc, 20t) (JaclcHonrille, Fla.; 



I'einiitn/ton'H dap, I'a.; live Sprimj, Kij.)', M«in«!rt, Myr. Mns. Haun., Ill, 3.5, 



188(5 (Bilojri, .l/i«/«.); McNeill, Proc, V. S. Nat. Mus., 326, IHHI (Pensacola, 



Fla.)) rndcrwood, Knt. Ain«r.. »U, 1887. 

 1888. — TheatopH craMnipe>t liollntan, Ann. N. Y. Acad. Nat. Sci., 110 {Hearer Creek, 



Tenn.). 



Habitat. — East «>f the Mississippi liivor, N. to Vii},'iniii, Indianii, Jiud 

 Illinois. 



Etymology: Lat., posterior. 



A coniparison of northern and southern si)ecimens shows several dif- 

 ferences as in IScolopocryptops .sexxpinotiitn. 



3. Theatops spinicauda. 



1862. — Opislhemcga spinicauda Wood, .lourn. Acad. Nat. Sci. Phila., 36(Cook Co., III.) ; 



Wood, Trans. Amer. Phil. Soc., 170, 1S»« (lllinoiN; Allettlivny Co., I'l.); 



Kohlransch, Ar<hiv f. Natnrji., 13t!, 18S1 ; Meincrt. Proc. Amer. Phil. Soc, 208, 



1886 {.Icapitleo. J/«x.); Pnderwood, Knt. Annr., 64, 1S87. 

 1888. — Theatops Hpinica lid II n litdlman. Ent. Amer., 6 (Little Uovk, Arkudelphia, <>ko- 



lona. Muddy Fork, and rilima Thiile, Irk.), 



J/rti/<rtY.— Southwestern United States S. to Acai)uleo, Mexico; N. 

 through Illinois to (!hicaji:o; 10. throuj^h Tennessee to the mountains, 

 and then N. to Allegheny County, Pa. 



Etymology: spina, spine; cauda, tail. 



Subfamily III. — SroLOPENDRiDJE. 



ISii.—rScolopendrina' Newport. Trans. Linn. Hoc, 378. 



1844. — £?e<ero8<omi«a! Newport. 1. c, 244. 



1844. — Cormocephalina' l<!e\y\)ort. 1. c, 419. 



1847. — ScoIopendridiH eribriferen Gervais. A])tcres, 243 and 244. 



1847, — Seal opendr ides viorsicantea Gervais. Ap teres, 243 and 258. 



