40 rii(ir::Ki)i\(iS OF THE XATinxM. Mrsr.j'M. vouxx 



11. SINALOA, new genus. 

 ((Jeogruphiciil name.) 



I>o<ly shaped much as in PayaiflemoiKi, malt* ami female, ])rieti\ 

 ]»il(>se. Head a little inomiiient, the vertex well arcluMl and the las 

 tigiiim rather rapidly descending, shallowly sulcate. the frontal fost:i 

 not veiv broad, about as broad as the interval between the eves, sub 

 eijual, percMirrent, suleate; face but little retreating: eyes separated 

 by a tolerably narrow interval, narrower in male than female, rather 

 prominent in the male, considerably (female) or very much (male) longer 

 than the anterior intraocular jmrtion of the genae : antennae moderately 

 stout, in the male much longer than the head and prouotum together. 

 Pronotum subequal in the male, but with slightly expanding from 

 margin and metazona, distinctlj'^ enlarging posteriorly in the female, 

 both front and hind margin truncate, the latter feebly emarginate, with 

 slight jiercurrent median carina and no lateral carinae, the lateral lobes 

 vertical ; i)rozona almost twice as hmg as, and less feebly i)unctate than, 

 the metazona, cut in the middle by a transverse sulcus, followed behind 

 by a sinuous or broadly W-shaped sulcus, both tolerably distinct. 

 Prosternal sj)ine erect, conical, bluntly i)ointed; interval between meso 

 sternal lobes feebly transverse in both sexes, the metasternal lobes not 

 very close. Tegmina brief, lobiform, lateral. Fore and middle femora 

 of male tumid; hind femora moderately long but stout, the spines ot 

 the outer row of hind tibiae ten to eleven in number. Margin of 

 subgenital i)late of male straight from the base, which is in no way 

 ampliate; cerci compressed laminate, subequal, slender; furcula con 

 sisting of a pair of i)arallel, attiugent, slender, si)ine-like processes. 



The only species known is from Mexico. 



SINALOA BEHRENSII, new species. 

 (Plate III. t\g. 7.) 



Body fusco-testaceous above, tlavo-testaceous beneath, the two colors 

 sei)arated on the sides by a broad blackish fuscous band, extending; 

 from behind the eyes across the lateral lobes of the pronotum, subecpial 

 and well detine<l throughout but, at least in the female, slightly enlarge<l 

 and a little obsolescent on the metazona, continued, at least in the male, 

 on the sides of the ba.se of the abdomen. Head tlavo testaceous, with a 

 mediodorsal, widening, blackish fuscous or dull fuscous stripe from the 

 base of the fastigiuin backward, sometimes broken ; face with extremely 

 feeble signs of delicate puncta, no more abundant on the frontal costa 

 than elsewhere; antennae tlavo testaceous, growing iufuscated apicall\ . 

 Pronotum with the metazona transversely and subrugosely punctate, 

 especially in the male and on the lateral lobes, simply punctate on tlie 

 disk in the female, transversely striate iu the region of the lateral 

 carinae on the prozona, the median carina sometimes blackish fuscous 

 in continuation of the stripe on the head. Tegmina fusco testaceous, 

 somewhat darkest on anterior half, hardly so long as the prozona, 



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