12 



from it prineipallj' in the unif.n-m an.i dark coloring of the antennre 

 and femora, the hirsnteness of the whole body, the punctate abdo- 

 men and the slender forceps. 



50. Labia arcuata. Head black, slightly tumid, very mi- 

 nutely ru'j,nlose, covered with very short pile, palpi dark brown; an- 

 tennas with eleven joints, pilose, blackish brown, the terminal half of 

 the apical joint pale. Pronotura black, the sides scarcely tinged with 

 testaceous, quadrate, scarcely longer than broad, scarcely narrowing 

 posteriorly, the sides straight, the posterior angle well marked, hind 

 edge gently convex ; the front half slightly tumid, with a median 

 impressed line, the rest flat. Tegmina glistening black, covered with 

 short pile, more than twice as long as the pronotum, each as broad 

 as the pronotum, the apex roundly excised ; exposed part of wings 

 slender, almost pointed, black, nearly as long as the pronotum. Legs 

 dark brown, the apical half of tiljiaj and tarsi growing lighter. Ab- 

 domen dark mahogany brown above, blackish at the sides, castaneous 

 below, covered wholly with short pile. Pygidium very broad, bifid, 

 with large teeth. Forceps about a third as long as the abdomen, 

 strongly arcuate, trigono-arcuate on basal, straightcr half; beyond 

 flattened cylindrical, bent Inward, nearly straight, and the apex 

 pointed and not incurved; the inner surface is nearly flat, with an 

 upper and lower edge ; the upper edge is smooth, with a minute 

 tooth near the base ; the lower edge has a larger triangular laminate 

 tooth slightly further from the base, and directed a little downward. 

 Length of body, 6.4 mm.; of antennae, 4.1 mm.; of tegmina and 

 wings, 3 mm. ; of hind femora, 1.3 mm.; of forceps, 1.6 mm. 1 cJ. 

 Vassouras, one hundred miles north of Rio, Brazil, taken March 5. 

 (B. P. Mann.) 



A Century of Orthoptera. Decade VL — Forficulaui^ 

 (N. American). 



51. Neolobophora volsella. Head smooth, glistening, 

 vinous red, the eyes pieeons, and the front strongly obscured with 

 blackish, sutures of the head deeply impressed, and either hemis- 

 phere of the occiput intumescent; antennas blackish fuscous, gradu- 

 ally growing a little paler toward the tip, the basal joint often tinged 

 with reddish; thorax and abdomen piceous, the sides of the protho- 

 rax duU luteous, Prothorax smooth, with very delicate and faint 

 infrequent transverse furrows, and a very slight median sulcation. 



