26 IOWA STUDIES IN NATURAL HISTORY 
Genus PycnosceLus Seudder 
Pycnoscelus surinamensis Linneus 
Blatta surinamensis Linn., Syst. Natur., ed. xm, p. 687 (1767). 
Leucophaea surinamensis Kirby, Syn. Cat. Orth., vol. 1, p. 151 (1904). 
Pycnoscelus surinamensis Hebard, Mem. Amer. Ent. Soc., No. 2, p. 193, 
pl. vi, fig. 1 (1917). 
This cosmopolitan roach, which has a number of synonyms 
recorded in literature, is represented in this collection by thirteen 
specimens, six adults and seven nymphs of various sizes, all fe- 
males. Two of the adults are from Antigua, the others from 
Barbados. 
This species, the males of which are extremely rare, has been 
recorded from various of the West Indian Islands and is a roach 
quite generally met with throughout the warmer regions of the 
world. 
Genus HEMIBLABERA Saussure 
Hemiblabera granulata Saussure 
Hemiblabera granulata Sauss., Soc. Ent., vol. vil, p. 68 (1893). 
Hemiblabera granulata Kirby, Syn. Cat. Orth., vol. 1, p. 166 (1904). 
Hemiblabera granulata Sauss. and Zehnt., Biol. Cent. Amer., Orth., vol. 
I, p. 122, plate v. fig. 21 (1894). 
Sixteen specimens of a roach which I refer to this species were 
taken by the expedition, four adult and two immature males and 
nine adult and one immature females, all from Antigua on the 
24 and 29 of June. 
The above specimens agree too well with the description of 
granulata to allow of their being considered other than that 
species, in spite of their occurrence so far from the type locality, 
which is given in the original diagnosis as merely ‘‘Mexico.’’ 
But in the following year, Biol. Cent. Amer., Orth., vol. 1, p. 122, 
the more exact locality ‘‘La Antigua in Vera Cruz’’ is given. 
The type is said to be in the Geneva Museum, but how many 
specimens there were is not recorded. 
The male of this species appears to be as yet undescribed. 
This sex may be easily distinguished from the female, not by the 
number of abdominal segments, which appear to be the same in 
both sexes, but by the generally, but not invariably, smaller size 
of the male and by the subgenital plate, which is in the female 
almost as broad basally as the apical width of the preceding 
