Blattidae. 107 



Panchlora nivea (L.). 

 Blaita nivea Linnaeus, Syst. Nat. (ed. X), Vol. 1, p. 424 (1758). 



1 6. 



St. Thomas, Loango. The species ranges over the greater part 

 of the Neotropical region. 



Nauphoeta kuJsenthali n. sp. 



cj. Green (white in alcohol). Vertex of head strongly exposed. 

 Eyes rather wide apart. Antennae luteous. Pronotum sub-hexagonal, 

 anteriorly sub-truncate, posteriorly very obtusely produced, sides 

 slightly deflexed. Scutellnm exposed. Tegmina exceeding the apex 

 of the abdomen, mediastinal area cribrate-punctate, base of anal field 

 seriate-punctate. Wings of equal length with tegmina, anterior 

 part projecting considerably beyond posterior part, the outer margin 

 notched at the junction of the two parts. Second abdominal tergite 

 with a scent-gland opening, marked by two curved carinae diverging 

 from a central papilla. Supra-anal lamina quadrate, its posterior 

 margin faintly sinuate and triangularly notched in the middle. Sub- 

 genital lamina of the usual form in this genus, symmetrical, posterior 

 angles outwardly and backwardly produced, posterior margin rounded, 

 slightly thickened and faintly hirsute, styles slender, situated in 

 lateral notches. Cerci moderate, none of the apical joints enlarged. 



Femora with the formula of the apical spines -p j, -=-. 



Total length 43 mm ; length of body 36 mm ; length of tegmina 

 34 mm; pronotum 9X13 mm. 1 $. 



Loango near St. Thomas. 



The unique specimen exhibits an interesting abnormality, the 

 left posterior tarsus has only four joints, the third of which bears 

 two pulvilli. 



The genus NaupJweta has not been recorded hitherto from the 

 New World with the exception of the cosmopolitan species N. cinerea 

 Oliv. The distinctions between the genera Nauphoeta and Panchlora 

 are not well-marked and have apparently not been recognised with 

 sufficient accuracy. Characters based on the form of the pronotum 

 are extremely unsatisfactory and are often only of value for purposes 

 of discriminating between species of the same genus, but taken in 

 conjunction with other structural features they are of service. I 

 have examined a good number of species of Panchlora and Nauphoeta 

 and find that the genera can be discriminated as follows: 



8* 



