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HEMIBLOSSIA. 



67 



HEMIBLOSSIA 



Hemiblossia 



Wis 



Solifugse, p. 103 (1901) 



Anst. xvi. p. 233 (1899) ' ; Das Tierr., Palpigradi et 



Closely allied to Ammotrecha, but with the tarsus of the fourth leg short, straight, dorsally arched and 



unsegraented. All the legs are shorter and relatively thicker, especially the femur of the fourth The 

 ocular tubercle is furnished with two rows of subsymmetrically arranged bristles, of which the anterior 

 two are considerably the longest. 



H. 



Up to the present time only two species of this genus have been described, namely. 

 H. bouvieri, Kraep., and H. o'neili, Purcell, both of which occur in S. Africa. Neither 

 of these is known to me in nature ; but I am unable to find in their diagnosis mention 

 of any differential character which justifies, in my opinion, the establishment of a new 

 genus for the Central-American species described below, strange as may seem the 

 generic identity between the Neotropical and Ethiopian forms. Slight differences 

 perhaps exist in the numbers of hairs upon the ocular tubercle and the nature of the 

 hairy clothing upon the palpi ; but without a careful comparison between the types 



of the known species it would be premature to attach a generic significance to these 

 features. 



l. Hemiblossia vittata, s P . n. (Tab. XII. figg. 10, 10 a-d, ? .) 



Colour : head, mandibles, legs, palpi, and abdomen deep blackish-brown, the abdomen with a clear white 

 median dorsal stripe, which extends of even width from the last segment over those of the thorax up to 

 the head ; lateral integument of abdomen deep greyish-black almost down to the sternal plates, which 

 are themselves mfuscate, the posterior wholly so, the anterior with a patch at the sides and on the 

 posterior angle ; genital operculum pale ; malleoli with black margin. Head-plate thickly beset with short 

 pale, blunt-tipped hairs ; ocular tubercle with two rows of subsymmetrically disposed shorter hairs behind 

 the longer stouter anterior pair. Palpi short ; the width of the head equal to the length of the patella 

 and half the tibia ; thickly clothed with short, simply attenuate hairs, and furnished in addition with Ion- 

 sensory setae ; without cylindrical bristles. Mandibles toothed as in Ammotrecha stolli. Legs spined 

 approximately as in the genus Ammotrecha, but the spines relatively stouter ; all the legs short ; the width 

 of the head-plate equal to the patella and half the tibia of the fourth. 



Measurements in mm.— Total length 13 ; width of head 2 ; length of palpus 4, of fourth leg 6. 



Hah. Guatemala (Sarg). 



Although in the general darkness of its coloration this species approaches the two 

 South-African forms, it may be at once distinguished from them by the presence of 

 the conspicuous median dorsal white band. 



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The following species cannot be placed in any taxonomic arrangement, the descrip 

 and figure being inadequate : 



Cleolis hirsutus, Banks, Proc. Calif. Acad. Sci. (3) i. p. 291, t. 17. fig. 31 (1898) 



Hab. Mexico 



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