MORGAN HEBARD 211 



Size medium'" for the genus, form moderately broad. Head with inter- 

 ocuhir space three-fifths as wide as that lietween the ocelli.'* Area from 

 between ocelli to labrum weakly depressed, transversely wrinkled. Teg- 

 mina broader than in grata and subcoriaceous, showing very little gloss, as 

 in erratica. Other features as described for grata, except the concealed geni- 

 talia. Concealed sinistral genital hook very slender, elongate, curving gently 

 inward to apex, which is slightly enlarged and barbed like a fish-hook, as is 

 characteristic of the Erratica Group of the genus. 



Dextro-dorsal genital plate with ventral surface not concave and partially 

 in contact with dextro-ventral genital i)late. Dextro-ventral genital plate 

 vertically narrow, broadly and roundly angulate emarginate to near its base 

 sinistrad of median point, the dextral portion thus formed a small smooth 

 rounded lobe, the sinistral portion an irregularly rounded angulate projection 

 of equal height. 



Allotype. — 9 ; same data as type. [Hebard Collection.] 

 Identical with females of erratica, apparently separable only by the fact 

 that the areas of geographic distribution of these two species do not appear 

 to overlap. Very unlike male, apterous, size much larger, form broad ovate. 

 Interocular space slightly broader than that between the ocelli. Dorsal 

 surface rugulose, covered with very short, but stout, minute reddish hairs, 

 these longest along the margins of the body, particularly cephalad. Pro- 

 notum moderately broad, cephalic margin evenly arcuate, caudal margin 

 almost transverse, very weakly produced mesad, with sides showing a slight 

 concavity. Each abdominal segment with a dot of darker brown meso- 

 laterad, both above and below. '^ Supra-anal plate transverse, weakly trapezi- 

 form; caudal margin weakly convex laterad, with mesal fifth subtruncate, 

 showing an indication of mesal emargination. Subgenital plate very large, 

 roundly jiroduced. Limbs and armament differing from that of male as 

 given under key heading, as characteristic of genus. 



'' Individual size variation is decided in this species. The series from 

 Carrizo Springs varies from the size of the type, which is as large as Browns- 

 ville males of hoJliana, to a .size rather small for the genus, this latter being 

 of about the size normal for erratica. 



18 Individually variable, in the series at hand ranging from one-third to 

 three-fifths as wide as that between the ocelli, the majority being approxi- 

 mately two-fifths. 



1^ This feature is rarely absent in toti'awa and erratica, rarely present in 

 aj)ar}ia. 



TRANS. AM. ENT. SOC, XLVI. 



