MORGAN HEBARD 27 



The general appearance and distinctly oblique discoidal sectors 

 of the tegmina would suggest affinity to Ceratinoptera sensu stric- 

 tiore,-"' but the imptjrtant characters of supra-anal plate, form of 

 limbs, armament of ventro-cephalic margins of cephalic femora 

 and presence of arolia, show wide separation from that likewise 

 distinctive and anomalous genus. With the succeeding genus, 

 Aglaoptcryx, agreement is found in the very delicate structure, 

 unmodified dorsal surface of male abdomen, more transverse male 

 supra-anal plate than is usual in the group and arrangement of 

 puhilli. l)ut decided difference is found in the general facies, con- 

 tour and male genitalia. 



The single species, here discussed, occurs in the Brownsville 

 region of Texas. 



Genus monotypic. Genotype: Euthlastoblatta abortiva [Ana- 

 plecta abortiva] (Caudell). 



Generic Description. — The sexes show moderate difl'erences in 

 size and form. Head not \ery elongate, evenly rounded; inter- 

 ocular space broad ; inter-ocular-ocellar area not flattened ; ocellar 

 spots weakly defined. Antennae setaceous. Tegmina when fully 

 developed'-'-' delicate in structure, discoidal sectors oblique, numer- 

 ous (ten usual), weakly defined and scarcely distinguishable from 

 parallel channels in each intervening area. Wings when fully 

 developed with area of costal veins broad, these veins enlarged in 

 distal fourth, distal margin of anterior field rather broadly 

 rounded,'"' rami of ulnar \ein few. Dorsal surface of male abdo- 

 men unspecialized. Supra-anal plate in both sexes strongly trans- 

 verse, little produced. Limbs stout. Cephalic femora with 

 ventro-cephalic margins armed proximad with a few moderately 

 stout spines, between the more distal of which are situated a few 

 minute piliform spines, these succeeded by a closely set row of 

 minute piliform spines which occupy fully half this margin, suc- 

 ceeded by two long spines of which the more distal is the longest; 



^* See Hebard, Trans. Am. Em. Soc, xlii, pp. 125 to 134, (1916). 



^^ In the only described species the tegmina are fully developed in the male, decidedly 

 reduced in the female. 



^^ This is more decided than in the majority of the American species of the Blattellites. 

 This character is used in separating the Ectobiine genera Tlieganopleryx and Eiitheganop- 

 teryx. SeeShelford, Ann. Mus. Zool. Acad. Imp. Sci. St. Petersbourg, xvii, p. 56, (1912). 



MEM. AM. ENT. SOC, 2. 



