THK MVKIA1'(»1>A OF NORTH AMKRICA. 191 



tliird of p()st«'iior half of sejiiin'iit. Anal sc^^mnit ohttise, not jno- 

 jectinj; bt'yond valvrs; anal valves more stnmgly coiuprt'sscd than in 

 hrnnthi, (h'nsoly punctati', especially above; anal s('ale sli^'htly aiijfii- 

 lated. Leffs short, not (piite extending beyond sides of body. Sejf- 

 nients r)4-.~)0. Len^ith r)(>-."ir)""" ; width, 4-4..'V""'. 



This species is described from two specimens whi<'-h 1 found amouf-st 

 a larj^f nnnd»er of .S'. sur'nutimnsis without any locality; but as tln-re 

 was another \'ial of sininaturnsls labelled •* Siiriiuttu " I am inclined to 

 believe that this species is from th(^ same locality. »S'. rulranns Karsch, 

 the only other American species havinjf the re[)ujinatorial pore on the 

 posterior half «)f segment, has .'i-f-3 or 4-|-4 elypeal foveohe. 



2. Spirobolus callipus, h)i. iiov. 



Di<i<jH(»tiK. — Related to Spirohohis hrcvicollis Voges, but the (rlyj)eal 

 foveohe 3-I-.5 or 4 + 3; segments 43-47; S coxseof 3, 4, 5, pairs of legs 

 proiluced; tarsa* without a polster. 



Habitat. — Guanajuato, ^lexico; Duges. 



Type. — Male and female, U. S. Nat. Museum. 



Drscriptfon. — Male and female. Ochra<-eous, posterior b;»rder of seg- 

 ments dark; antenna- an<l legs brown, joints ringed with white. Ivo" 

 bust, anterior segments scarcely attenuated. \ ertex moderately smooth, 

 sparsely punctate and very slightly reticulated, siilcus sho't, not very 

 shallow; elypeus transversely wrinkled, not very deeply excised, 

 foveohe 3+3 or3+4, sulcus large, extending to opposite base of antenuje. 

 Auteuua' almost tiliform, not extending beyond second segment; that 

 of the female slightly shorter. Ocelli 30-3(5 in 5 uv (» series; patch sub- 

 triangular. Segments not striate or wrinkled above, but densely i)unc- 

 tate; posterior part beneath Avith almost straight stria*, those on an- 

 terior part more oblique, forming an obtuse rounded angle in connection 

 Avith those on posterior part. Sides of tirst segment subacute, no striie 

 except marginal: anterior border subexcised. Kepugnatorial pore 

 small, touching sulcus, which is bent forwards; behind pore on pos- 

 terior part a deep sulcus. Anal segment subacute, uot extending be- 

 yond anal valves; anal valves moderately margined, ])unctate; anal 

 scale large, obtusely angled. Legs short, not extending beyond sides 

 of boSy. Segments female, 43 ; male, 47. 



Ma]3 less robust than female ; coxa', of 3, 4, •>, <> pairs of legs produced, 

 that of third largest and curved backward, the rest short; coxje of 

 second pair large; tarsi without a pad or other markings. Copulation 

 foot very diiferent from thut of brev icol I in, resembling that of S. ameri- 

 ea'-borealis ; ventral plate obtusely angled, one-half as high as foot; 

 inner part of anterior foot pointed and covered with numerous short, 

 round truncate tubercles, outer i)art with its end curved outwards, not 

 tuberculate; posterior foot hook-like, pointed, its anterior surface 

 tuberculate. Length, 58""" ; width, 0.5""". 



