ANOPLURA OF THAILAND — JOHNSON 579 



lias llio poslorior angles of paratergal plates IV-VI produced into 

 acute points that are almost as long as the apical setae. In erismata 

 the apical angles of paratergal plates IV-V are very short, obviously 

 much shorter than the apical setae, and paratergal plate VI has 

 scarcely any angles. In the male of thurmanae, the apical angles of 

 paratergal plates IV-VI are not so long as in the female, but definitely 

 longer than in erismata. H. thurmanae also differs from erismata in 

 the shape of the thoracic sternal plate (compare figs. 25 and 26). 

 In thurmanae the plate has definite lateral and anterior angles; in 

 erismata the lateral angles are smoothed out so that the lateral and 

 anterior margins form a continuous curve. Male genitalia of the 

 two species are quite dift'erent (compare figs. 23 and 24). 



Description: Female: Head rounded anteriorly, postantennal 

 angles definite but rounded; postantennal head margins slightly 

 convergent posteriorly. Thorax with thoracic sternal plate diamond- 

 shaped, the posterior angle more produced than the anterior angle. 

 Abdomen with outermost of the two modified setae on the first 

 sternal plate of segment 3 usually definitely bent. Typical abdominal 

 segment with three narrow sternal and tergal plates; both dorsally 

 and ventrally with one seta laterally on each side, off the plates. 

 Paratergal plates as in figure 22; plates IV-V produced inward 

 anteriorly toward the midline both dorsally and ventrally. Plates 

 IV-VI with apical angles produced into long acute points which 

 are almost as long as the apical setae; plate VII lacking posterior 

 angles but not much reduced. 



Male: Head as in female except third antennal segment with a 

 short stout dorsal seta. Thorax as in female. Abdomen with outer- 

 most of the two modified setae on the first sternal plate of segment 3 

 usually definitely bent. Sternal and tergal plates as in genus, nar- 

 rowed but not strongly reduced; one or two setae laterally ofT tergal 

 plates of segments 4-6, and one seta laterally on sternites 4-6, midway 

 between the two sternal plates of each of these segments. Paratergal 

 plates IV-VI and sometimes VII anteriorly produced inward toward 

 midline both dorsally and ventrally. Plate VII not noticeably re- 

 duced; plates IV-VI with posterior angles produced into points 

 that are not so long as in female, being no more than half the length 

 of the apical setae. Genitalia with parameres poorly sclerotized, 

 particularly basally; pseudopenis v/ith triangular flanges on each 

 side at about middle, its apex triangular, slightly serrate. 



Lengths: Female 1.15-1.2 mm.; male 0.85 mm. 



One collection of H. thurmanae was taken from Merietes, but that 

 this is a normal occurrence needs to be confirmed. 



