196 PROCEEDINGS OF THE ACADEMY OF [Part II 



PSEUDOMOPINAE. 

 Sciablatta poecila^ new species. Plate IX, figures 12, 13, 14 and 15. 



The comparatively thorough color description of Walker 's Blatta 

 varicornis from Santarem, Brazil/ leaves little doubt but that the 

 present species is very closely related. From that description, 

 varicornis appears to differ only in the tegmina; "brown, with whit- 

 ish veins, and with a broad whitish hyaline costal space which tapers 

 towards the tip." The structural characters will probably show 

 much more important differences for that species, though we feel 

 that it may safely be assigned to Sciablatta. 



Compared with the genotype, S. mamatoco Hebard, described 

 from Santa Marta, Colombia,^ poecila differs in the male sex in the 

 smaller size, broader form, delicate but more intricate and extensive 

 markings, proportionately much broader pronotum, proportionately 

 broader tegmina, with apices more nearly median in position and 

 discoidal sectors slightly more oblique and subgenital plate, with 

 the fused styles, much more elongate and slender. 



In the specialization of the male subgenital plate and dorsal sur- 

 face of the abdomen, greatest convergence in the known species of 

 the Blattellae to the characteristic type found in the Oxyhaloid 

 genus CJiorisojieura is shown by this species. 



The intricate markings of this insect are so delicate, except on 

 head and antennae, that their real beauty is not realized until a 

 microscopic examination is made. 



Type : cf"; St. Jean du Maroni, French Guiana. March. [Paris 

 Museum.] 



Size medium small for the Group Blattellae, form very broad 

 for the Group. Interocular space moderately broad, three-quarters 

 as wide as that between the antennal sockets, flattened and show- 

 ing weak, irregular impressions. Lateral margins of cheeks con- 

 verging distinctly ventrad. Maxillary palpi very short, third joint 

 very slightly longer than the enlarged fifth joint, fourth joint two- 

 thirds as long, enlarged regularly and considerably distad. Tegmen 

 with discoidal vein an equal distance from the costal and sutural 

 margins mesad, costal margin rounding toward sutural slightly 

 more than is usual in the Group, discoidal sectors (13 and 15) de- 

 cidedly oblique, as oblique as the costal veins. Wings with (8) 

 proximal costal veins moderately thickened in distal portions, 

 mediastine vein unbranched, ulnar vein with (8, including two sub- 



^From kOCKiXt] = dappled. 



4 Cat. Blatt. Br. Mus., p. 216, (1868). 



6 Trans. Am. Ent. Soc, XLVII. p.ll5, (1921). 



