Dr. H. Karny on the rfcncra Liothrips and Huodia. 471 



species, belonging to the genus Hoodia. I will first give 

 a tabular view of all the known species of both genera, 

 and then add a few remarks upon them. 



Revision of the known species of Liothrips.* 



1. Fore tarsi toothed in both sexes. 



2. Third to fifth joints of antennae yellow ; the latter often centrally 



brownish ; sixth basally yellow ; thence brown ; seventh 

 entirely brown. Tarsal tooth small, pointed, only visible in 

 one position of the tarsus. L. seticollis, nov. spec. (Paraguay). 



2'. Third to sixth joints of antennae entirely, seventh mostly 

 yellowish. Tarsal tooth blunt, stout. 



1. L. tarsidens, Trybom (Madagascar). 



1'. Fore tarsi without tooth in female. 



2. Wings entirely wanting. 2. L/of/i rips, sp. Trybom (Madagascar). 

 2'. Wings present. 



3. Basal half of forewings black or light brown. 



3. L. umbripennis, Hood (North America). 

 3'. Forewings, at most, brown at extreme base, then hyaline, or with 

 only a central dark stripe. 



4. Antennae yellow ; at most, joints, one, two and eight dark. 



5. Eighth joint of antennae yellow. 



4. L. citricornis, Hood (North America). 

 5'. Eighth joint of antennae dark. 



6. Fore tibiae dark . . . 5. L. major, Bulfa (Erithraea). 

 6'. Fore tibiae yellow . . 6. i. se^inotZ^s, Renter (Europe). 

 4'. Seventh joint of antennae also entirely and at least the apical 



half of sixth dark. 



5. First and second joints of antennae dark, third to fifth yellow, 



the sixth basally yellow, apically dark, seventh and eighth 

 dark. 



6. Fore tibiae entirely yellow; intermediate and hind tibiae black, 



apically suddenly yellow. 



7. L. hmdecensis, Uzel (Central Europe). 

 6'. All tibiae uniform dark brown. 



8. L. seticollis, nov. spec.f (Paraguay). 



5' Sixth joint of antennae entirely dark. 



6. Fourth and fifth joints of antennae at least partly yellow. 



* When this table was written I did not yet know the description 

 of Liothri2)s glycinicola, Okanoto, from Japan. 



I I have again inserted this species because the tarsal tooth is not 

 visible in the normal position of the tarsus. 



TRANS. ENT, SOC. LOND. 1912. — PART II. (OCT.) I I 



