MORGAN HEBARD 117 



Ventro-cephalic margin of cephalic femora supplied with a fringe of 

 hairs, terminated by a single stout spine; occasional individuals 

 show one or a few stout proximal spines on this margin ; which is the 

 normal condition in Blaherus. Ventro-caudal femoral margins 

 supplied with hairs; ventro-caudal margin of cephalic and median 

 femora armed, distad only, with two closely placed heavy spines ;'^^^ 

 in Blaherus these two distal spines are never found. Limbs pro- 

 portionately somewhat shorter and stouter than in Blaberus. 



Eublaberus biolleyi (Rehn) 



1906. Blaherus biolleyi Rehn, Proc. Acad. Nat. Sci. Phila., 1905, p. 792, fig. i. 



[ 9 ; Reventazon River, plains of Santa Clara, Costa Rica.] 



Cabima, Panama, \', 27, 191 1, (Busck), i ?. 



The present specimen closely resembles the type. The pronotum 

 is slightly more ample, the tw^o pair of dots cephalad similar, the 

 pair of median blotches and pair of caudal blotches narrowly fusing 

 longitudinally with each other and with the broad caudal marginal 

 black band. We would note that this marginal band is broadest 

 mesad in the present species, narrowing toward the point above the 

 humeral trunk of the tegmina on each side and very narrowly con- 

 tinued beyond. In E. posticus (Erichson) this band is nearly 

 subequal in width throughout and is sharply obliquely terminated 

 at the point above the humeral trunk of the tegmina on each side. 



Eublaberus posticus (Erichson) 



1848. Blabera postica Erichson, in Schomb. Reisen Brit. Guiana, iii, p. 580. 



[British Guiana.] 

 1894. Blabera thoracica Saussure and Zehntner, Biol. Cent.-Am., Orth., i, p. 120, pi. 



V, fig. 25. [ 9 : Panama; Bogota, Colombia.] 

 1896. B[labera] thoracica Griffini. Boll. Mus. Zool. Anat. comp. Univ. Torino, xi, 



no. 236, p. 5. [ 9 ; Punta di Sabana, Darien.] 



Panama, i 9 , [U. S. N. M.] 



Gatun, Canal Zone, Pan., VII, 25 to \TII,22, 1916, (Harrower; one in house),2 9. 



The present insect is distinctive in having, in the area of the 



lyrate pronotal escutcheon, a large number of small dark dots and 



blotches, rather than a few hca\ier markings, as found in E. biolleyi 



(Rehn), or a heavy suffusion such as occurs in the remaining species 



of the genus. 



"" Occasionally one or both of these spines are missing on one or more of these femora. 

 Not a specimen at hand, however, fails to have at least two of the four femora supplied 

 with these two distal spines, which occur in no other genus of the Blattidae known to us. 



MEM. AM. ENT. SOC, 4. 



