4 JAMES A. G. REHN. 



This species is closely related to both E. conspersa and azteca, but 

 is separated from each by very appreciable characters. The size is 

 less than E. conspersa, the apex of the anal field is acute instead of 

 obtuse as in that species, and the supranal and subgenital plates are 

 both more acuminate. From E. azteca it is separated by the form 

 of the supranal plate, which is produced and acuminate instead of 

 rotundate or subtruncate. 



Size rather small. Head distinctly visible in front of the pronotum when 

 dorsally viewed, anterior outline well rounded ; eyes large, considerably sepa- 

 rated ; antennae filiform, sparsely pilose, over twice as long as the pronotum. 

 Pronotum large, produced anteriorly, posterior margin triangularly produced, 

 deflected lobes with the margins broadly rounded. Tegmina exceeding the apex 

 of the abdomen, rather narrow, apex rounded, costal margin gently arcuate; anal 

 sulci extended posteriorly, giving the anal field a semi-hastate form. Wings ample, 

 extending to the tip of the tegmina when in repose. Femora sparsely spined ; an- 

 terior paii- bearing four spines on the central portion of the lower margin, three 

 moderately large spines on the upper margin ; median pair bear three centrally 

 grouped spines on the lower margin, four on the upper; posterior pair with three 

 spines on each margin, those on the lower margin centrally grouped, the last 

 spine on the upper margin separated from the other two by a considerable inter- 

 space. Tibiae heavily spined ; basal tarsal joint set with fine spines, the general 

 appearance being that of pectination. Supranal plate triangularly produced, 

 margins somewhat reflexed, apex triangularly emarginate. Subgenital plate 

 triangularly produced, scoop-like. Cerci slightly exceeding the supranal plate 

 in length. 



General color above tawny-olive.* Pronotum raw umber, very closely and 

 minutely punctate with brownish black, the punctations being largest on the 

 periphery. Tegmina regularly punctate with Vandyke brown, the punctations 

 largest in the anal field and in the distal half of the tegmina, which latter region 

 contains several larger blotches of the same tint. Wings pellucid, the costal 

 region slightly suffused with brownish and punctate with pale brownish. Both 

 aspects of the abdomen blackish brown finely stippled on a brown-gray ground, 

 the body tint being most noticeable below. Limbs horn, speckled with blackish 

 brown; the overlying tint being strongest and more suffusing on the distal por- 

 tions of the tibiae. 

 Measurements: 



Length of body 21. mm. 



Length of pronotum ..... 5.5 mm. 



Greatest width of pronotum .... 7.5 mm. 



Length of tegmina ...... 20. mm. 



Periplanela australasisi* (Fabricius). 



1793, [Blatta] australasise Fabricius. Ent. Syst., ii, p. 7. 



Two males; .Minatitlan, Vera Cruz, Mexico. February 1, 1892. 

 * Ridgway's Nomenclature of Colors, pi. iii. 



