474 



Dr. H. Karny on the 



very slightly divergent posteriorly. On the basal third of 

 the third to sixth joints of the antennae there is in 

 L. hradecensis a transverse raised line, which is wanting 

 in all the other species of LiothriiJS and Hoodia known to 

 me. H. hagnalli has, in common with most of the allied 

 species, a long bristle behind the eyes, which is wanting 

 in L. hradecensis. 



The arrangement of the prothoracic bristles is the same 

 as in most species of Liothri'ps (e.g. citricornis, ocellatus, 

 seticollis) ; in L. hradecensis, on the contrary, bristles are 

 present only on the posterior angles. In L. seticollis all 

 the wings are characterised by a distinct brown median 

 longitudinal streak ; in H. hagnalli this is ill-defined and 

 indistinct ; in L. hradecensis it is entirely wanting. 



The duplication of the cilia on the posterior margin of 

 the forewing, as far as known to me, is characterised by 

 the following figures : — 



Species. 



Number of intekpolated Cilia. 



I was unable to ascertain this with respect to L. hrade- 

 censis without endangering the unique specimen in the 

 Vienna Hofmuseum. 



Turning now to the generic character — the shape of the 

 mouth-cone — it is to be noted first that Ziothrij^s agrees 

 in this respect with Hoplotkrips and Phlocothri]is, having 

 therefore an apically pointed mouth-cone, as is apparent 

 from Uzel's generic diagnosis. On the other hand, Ave 

 find in Hoodia forms of the mouth-cone which occur also 

 in Gijnaikothrips and Ilcsothrijys ; the lateral margins of 

 the cone first converge rectangularly or acute-angularly, 

 but are then apically rounded. In this point the two 

 species of Hoodia. differ from all true Liothrips."^ But 



* It has been already pointed out that Liofhrips bakeri, Crawford, 

 has a differently formed mouth-cone, and therefore does not belong 

 to Liothr ips. 



