IDENTIFICATION 



Male ; A distinct, long dorsal process of coxa I associates 

 this species with the R. appendiculatus group of Zumpt (19A2C) 

 but peculiar scutal characters place it with the R. atgantiacus 

 group (1943B) to which it is referred, not, however, for reasons 

 of indicating phylogenetic relationships but rather for the sake 

 of convenience. Lateral grooves are indicated by a row of some- 

 what dense and regular punctations, though shaillow lateral grooves 

 eis such may be present just anterior of the proximal festoons. 

 Posteromedian grooves are shagreened, distinct, long, and narrow; 

 paramedian grooves are shorter and wider, also shagreened. Punc- 

 tations are of medium size, fairly superficial, and moderately 

 dense; some fine interstitials may be apparent, especially lat- 

 erally. The basis capituli is strongly angled laterally in small 

 specimens (2.2 mm. long; 1.3 mm. wide) but more blunt and elon- 

 gate in large specimens (4-. 7 mm. long; 2.6 mm. wide) (as in R. 

 appendiculatus ) . It should be noted that in the specimen i2lus- 

 trated (Figure 281 ), the basis capituli is exceptionally short 

 and wide. The adanal shields (Figure 282) are most characteristic 

 though in some individuals the width of the posterior section is 

 not so great as in the specimen illustrated. The body greatly 

 bulges posteriorly upon engorgement and the median festoon pro- 

 trudes. Long, pale hairs are especially conspicuous on niunerous 

 specimens in the present collection and should receive further 

 study. 



Female ; The elongately ovoid scutum of this small species 

 lacks lateral grooves and has punctations like those of the bale; 

 punctations are rare laterally anterior of the flat eyes and on 

 the scapulae; cervical grooves are faintly indicated if at all. 

 The basis capituli appears to be more consistently sharply angled 

 than that of the male, but this might be a variable character. 



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