INSECUTOR INSCITI.^ MENSTRUUS 43 



1912. Physoihrips ericce, Karny, Zool. Ann., Vol. IV, p. 340. 



1912. Oxythrips parviceps. Bagnall, Journ. Econ. Biol., Vol. VII, 

 p. 191. 



1913. Oxyihrips parviccps, Bagnall, Scot. Nat., 1913, p. 38. 

 1913. Oxythrips ericce, Karny, Zool. Anz., Bd. XLIII, p. 136. 



1913. Oxythrips parviccps. Bagnall, Journ. Econ. Biol., Vol. VIII, 

 p. 234. 



1914. Oxythrips parviccps. Priesner, Wien. Ent. Zeit., XXXIII 

 Jahrg., p. 190. 



Distribution: Britain, Austria, Germany, Sweden, Finland. 



This species has had an unfortunate nomenclatorial history: 

 For seventeen years it was a nomen nudum, after which it 

 was described under three species names and successively as- 

 signed to five different genera. Thrips piceicornis Renter has 

 been united with ericce only after careful comparison. Their 

 identity is clearly shown by their coloration, structure, and 

 the measurements given below. The first column repre- 

 sents a female specimen of Oxythrips ericce from Britain, 

 received from Mr. Williams, while the second is of a topo- 

 typic female of Thrips piceicornis, determined and labeled by 

 Reuter himself : 



Oxythrips ericce Thrips piceicornis 

 (Female from (Female from 



Britain) Finland, topotypic) 



Length 1.030 mm. 0.990 mm. 



Head, length 0.099 mm. 0.090 mm. 



width 0.141 mm. 0.141 mm. 



Antennae, length 0.232 mm. 0.226 mm. 



Segment 1, length 0.018 mm. 0.018 mm. 



width 0.026 mm. 0.026 mm. 



Segment 2. length 0.033 mm. 0.033 mm. 



width 0.025 mm. 0.024 mm. 



Segment 3, length 0.040 mm. 0.039 mm. 



width 0.021 mm. 0.020 mm. 



Segment 4, length 0.041 mm. 0.040 mm. 



width 0.020 mm. 0.018 mm. 



Segment 5, length 0.031 mm. 0.029 mm. 



width 0.017 mm. 0.017 mm. 



Segment 6, length 0.046 mm. 0.044 mm. 



width 0.018 mm. 0.018 mm. 



