BAGNALL'S THYSANOPTERA 157 



Hemithrips simplex Bagnall 



(Text-fig. 76) 



Hemithrips simplex Bagnall, 1923a : 38. 



The specimen labelled ' Type ' is in a roughly cut piece of amber and is not easy to examine, 

 the following observations therefore refer to the second specimen (no. 10,364) which is apparently 

 conspecific. The antennae are well preserved, III and IV bearing an apical annular sensorium. 

 Contrary to the original description the costal setae are as small as on the other two veins, the 

 fore wing being very similar to that of femoralis. Three pairs of minute ocellar setae are visible, 

 pair I anterolateral of the first ocellus, pair II posterolateral of that ocellus close to the compound 

 eyes, pair III between the hind ocelli. This species is very similar to femoralis but the fore 

 femora are not enlarged. 



Holotype 9. In Baltic Amber, Phys. Oek. Ges. No. 9854. 1. 14. No. 3. 

 $. In Baltic Amber, Phys. Oek. Ges. No. 10,364.1.14. No. 1. 



Hemithrips thoracicus Bagnall 



Hemithrips thoracicus Bagnall, ia24g : 159. 



This is based on Schlechtendal's illustration 12 which was considered originally to 

 represent a form of Thrips pennifera Schlechtendal, 1887. 



STENUROTHRIPS Bagnall 



Stenurothrips Bagnall, igi4g : 484. Type-species S. succineus, by monotypy. 



The tenth abdominal segment of the species in this genus is greatly elongate as in 

 the recent genus Macrurothrips. From the form of the antennae Stenurothrips 

 appears to be related to the Heterothripidae, whereas Macrurothrips is a Thripid with 

 forked sense cones on antennals III and IV. Stannard (1956a) has discussed the 

 systematic position of Stenurothrips. 



Stenurothrips brevisetis Bagnall 

 Stenurothrips brevisetis Bagnall, 1923a : 37. 



This is a very poorly preserved specimen on which little detail can be made out 

 due to fractures in the amber. The fore wing venal setae however are about half as 

 long as those in succineus. 



Holotype $. In Baltic Amber, IB 428. 



Stenurothrips succineus Bagnall 



Stenurothrips succineus Bagnall, igi4g : 484-485. 



Three pairs of ocellar setae are present, pair III arise within the ocellar triangle as indicated 

 in Bagnall's original figure. 



Holotype $. In Baltic Amber, without data. 



