DISSOSTEIRA. 139 
graciles, longiuseulæ, annulatæ, apice fuscæ. Caput parum compressura; costa faciali 
ad verticem et infra oceilum coarctata. — Pronoti crista maxime elevata, arcuata, 
profunde oblique fissa, in metazona elevalior-arcuata, subundulata, utrinque rugulosa, 
in prozona subrecta, per sulcüm anticum subimpressa; processus metazonæ acutissi- 
mus. — Elytra fusco-punctato-irrorata; obsolete maculoso-3-fasciata. — Alæ disco 
basali sulfureo, fascia nigra lata, lobos 3 marginis liberante; apice parce fusco-intricato. 
— Pedes postici valde fimbriati. — Long. © 35, G° 25; EL. © 33, cf 25 mill. — 
Texas; Dallas. (Boll coll.) 
6. D. collaris, Scudd. — OEdip. collaris, Seudd. Geol. Surv. of Nebrask. 250; 
Thom. Geol. Surv. of Territ. 1871, 459; Acrid. 113. — Spharagemon collare, 
Scudd. Proc. Bost. Soc. XVIE 1875, 470, 5. 
Fulvo et fusco irrorata, fusco-punctata, pubescens. — Antennæ longiusculæ, fuscæ. 
Costa facialis sulcata, ad verticem breviter plana, vix coarctata. — Pronotum postice 
acute productum; dorsi crista prominula, lamellaris, per suleum typicum anguste 
oblique fissa, dentem retrospectantem in crista metazonæ incumbentem efficiens 
(ut in D. longipenne et cristato quamvis hine crista minus elevata est). — Elytra 
valde fusco-punctata, fasciata, modice confertim reticulata, vena intercalata v. mediæ 
propinqua. — Alæ disco basali sulfureo, fascia lata transversa fusca, postice arcuata ; 
pars apicalis vitrea apice fusco-punctata.-— Var. Pronotum obscurum, metazona lutea, 
pioro-punctata, — Long. © 30, cf 22; EL. © 30; çf 25 mill. — Amer. bor.; 
Nebraska, Colorado, Illinois, Texas. | 
D. Wyomingiana, Thom. Acrid. 113 (Spharagemon Wyoming. Sceudd. Proc. B. S. 
t. 17, 1875, 470, 4). à D. collari vix differre videtur, tantum statura minore, long. 
28 mill. 
7. D. æqualis, Say. — Gryllus æqualis, Say, Entom. of N. A. (Ed. Le Conte) 
IL, 237. — Locusta æqualis, Harris Ins. Inj. 178. — OEdip. æqualis, Uhler, 
Edit. Harris, 178; Thomas Acrid. 114. — ? OEd. Belfragü, SI, Recens. I, 
129,2: 
Griseo-fuscescens, lacteo-varia, fusco-punctata. — Antennæ elongatæ, annulatæ 
vel nigræ. Costa frontalis ad frontem constricta. Pronotum tenuiter granulatum, 
postice © rectangulum, çj' acutius; crista humili in metazona Gjf vix arcuata, 
in prozonæ tertia parte postica sinuata, ante incisuram dentem retrospectantem 
