246 
Psyche 
[September 
Figs. 217-220. Blaberus trapezoideus. Pronotum and genitalia. 217-218. 
(BMNH). Paralectotype of Blabera quadrifera Walker. 219-220. (BMNH). 
Lectotype of Blabera quadrifera Walker. Oajaca, Vera Cruz, Mexico. 221- 
224. Blaberus craniifer. Variations in the shape of the pronotum in speci- 
