128 GEO. H. HORN, M. D. 



ing to apex which is rotundato-truncate ; surface deeply striate, strife punc- 

 tured, those nearest the suture very indistinctly ; intervals convex; color usu- 

 ally somewhat paler than the thorax and with yellowish-white spaces irregu- 

 larly placed, consisting usually of a basal series containing a longer stripe on 

 the third and a short stripe on the fifth interval, an ante-median sinuous 

 transverse band consisting of short stripes on the intervals, a post-median 

 band, and a few sub-apical stripes. Body beneath black, shining. Length, 

 including rostrum, .34 — .80 inch; 9 — 20 mm. 



Male. — Rostrum stout, basal portion shorter than the apical, apex broader 

 than base, mandibles large, prominent. Basal portion of rostrum above with 

 deep concavity, at sides with two fossae immediately in front of each eye. 

 Apical portion with carina on each side, surface sparsely tuberculate. Femora 

 of each pair of legs with a small spine near the apex. First two abdominal 

 segments deeply grooved at middle. 



Female. — Rostrum slender, basal portion very short. Basal portion with 

 fossa immediately behind the insertion of the antennae and on each side two 

 impressions in front of each eye. Apical portion slender, cylindrical. Femora 

 all with small spine near apex. First two abdominal segments with feeble 

 median line. 



Occurs from Canada to Texas, and westward to Nebraska. 



BRENTIIUS, Fab. 

 Fabricius, Mantis. Ins. i. p. 95. 



The species of this genus are (in our faunal limits) all from the 

 Peninsula of Lower California. 



The following table will enable the species to be recognized : 



Thorax of usual form, elongate, conical. 



Dorsal channel deep, entire; femora all dentate % 9 peiliiisularis. 



Dorsal channel shallow, basal; anterior femora toothed lucailUS $. 



Thorax broadly constricted at middle. 



Dorsal channel moderate, not extending in front of constriction. 



Anterior femora alone toothed % lucailUS %. 



B. peiliiisularis, n. sp. — Brownish black, shining. Head obconical, 

 constricted and quadrituberculate at base. Thorax elongate conical, con- 

 stricted at base, above depressed and deeply channelled in nearly its entire 

 length, the more deeply near base and gradually evanescent toward the apex; 

 surface finely and very sparsely punctured. Elytra longer than the thorax, 

 dorsum flattened, surface deeply striate, the first and second deeper at apical 

 three-fourths, strife punctured, intervals convex, with few very fine punctures 

 the third interval at apex with short yellow line one-fourth the length of 

 the elytra, the fourth interval yellow, beginning opposite the end of the pre- 

 ceding lineole and extending to base and not dilated, eighth interval yellow 

 extending as far as that of the fourth, but not attaining the humerus, and with 

 a short lineole on the ninth interval corresponding with that of the third. 

 Femora of both sexes with a small spine near their apices. Body beneath 

 black, shining, smooth along the middle, coarsely punctured at the sides, last 

 three abdominal segments coarsely punctured, but more sparsely at middle. 



