228 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



of the plate; that portion weakly chitinous, roundly produced, 

 leaving a very deep, narrow cleft on each side between it and the 

 lateral portions, showing a blunt but decided medio-longitudinal 

 carina extending to its small apical portion, which portion is sud- 

 denly directed cephalad, its surface flat, its lateral margins cutting 

 in at the base so that, with the lateral margins of the basal portion, 

 very small but moderately deep concavities are formed. From the 

 bases of the very deep lateral clefts of the subgenital plate spring 

 similar, simple, elongate, straight and nearly cylindrical styles, 

 which, lying in these clefts between the median portion and the 

 lateral portions, extend half the distance to the apices of the lateral 

 portions of the plate, each about five times as long as its proximal 

 width. Cephalic femora with ventro-cephalic margin armed with 

 (4) large, elongate, moderately heavy, well-spaced spines, succeeded 

 by a row of (18) very minute but moderately stout spinulae, ter- 

 minated by three^^ large, moderately heavy spines, elongate in in- 

 creasing ratio distad; ventro-caudal margin armed with (3 and 1 

 distal) spines. Other femoral margins armed with spines, as 

 characteristic of the genus. Caudal metatarsus very elongate and 

 slender, nearly twice as long as the combined length of the succeed- 

 ing tarsal joints. Pulvilli on four proximal tarsal joints small, acute- 

 angulate produced. Tarsal claws symmetrical, the moderately 

 well-developed flange margined with very minute teeth. Arolia 

 between the tarsal claws moderately-well developed. 



General coloration buckthorn brown. Head with occiput 

 ochi'aceous-buff , with suffused vertical streaks of prouts brown; a 

 broad band of prouts brown between the eyes ;ocelli and inter-ocular- 

 ocellar area ochraceous-buff, this extending over face, but weaker 

 and more embrowned ventrad, a small fleck of prouts brown below 

 each ocellar spot, four similar flecks below Avhich are placed in a 

 transverse line showing convexity ventrad, area below antennal 

 sockets suffused with prouts brown, with a fleck of prouts brown 

 on each side meso-ventrad. Antennae clay color. Pronotum 

 transparent, faintly tinged with brown laterad; disk ochraceous- 

 buff, heavily though finely pictured with lines and dots of prouts 

 brown. Tegmina transparent, faintly tinged with brown, except 

 distad and in area of dextral tegmen concealed w^hen at rest where 

 the tinge is darker, mummy brown, this very heavy and blackish 



*^ A correction for this character for NeoblaUella, as given by us in our key, is 

 necessary, (Mem. Am. Ent. Soc, No. 4, p. 28, (1921).). We find that three 

 heavier distal spines occur in all of the species of the genus before us excepting 

 eudromielloides, herlandi and the numerous species of the Impar Group, in which 

 but two heavier distal spines are shown. In some species virtually an inter- 

 mediate condition is reached, the first of the three distal spines being sufficiently 

 reduced so that it would be counted by some and regarded as one of the series of 

 smaller si:)ines by others. Of the Group Blattellae, NeoblaUelln is much the larg- 

 est American genus and it is to be expected that much more decided differences 

 will be found between some of its component groups and species than occur 

 in any of the related genera. 



