g^ (March, 



The colonition of tlit' J in this species recalls P. discolor Karny, a species 

 that falls in the section wherein the autenual style is sliort and stout. 



Hab. Spai>', Arnes (Tarragona), August 1912 {Navas), both sexes. 



Physothrips navasi, sp. n. 



5 . Length about I'O nun. 



Entirely yellow, abdomen and le^^s paler tlian head and thornx, fore pnrt 

 of head brownisli-yellow, last abdominal seonienls distally lightly shi'dcd with 

 grey-brown and a postero-nieHian patch of li^zht grey-biown on sefiuienisJ: to 7. 

 Win^s pale gieyish-yellow. Antennae with joint 1 pale, '2 ytdlowi-h-brown, 

 3 and 4 pale, 4 lightly shaded with grey-brown distally; 5 light grev-brown, 

 pale at base ; 0, 7, and 8 grey-brown. 



Form much as in Itispanicus ; inter-ocellar bristles moderat»^ly long, placed 

 as in hisjxtnicus. Antennae twice as long as the head ; relative lengths of joints 

 3 to 6 and style (7-1-8) approximately as follows: — 31 (with stein) : 30 : 27 : 

 36:18. Pronotal setae at posterior angles short and stout; the outer 

 markedly shorter than the inner, about 2 : 3|. Fore wing with 9 setae in the 

 lower vein, long, those distally longer and more distant. 3 in distal half of 

 upper vein, one near middle and the second nearer to the distal seta than to 

 the first; distal seta much longer and stronger than the other two. 



Apical abdominal bristles moderately long ; those on 10 about 0'8-") the 

 length of 9 and not so stout. Posterior margins of tergite 8 without fringe. 



J. Length about 0'8 mm. Tergite 8 with a series of 4 long bristles as in 

 hispanicus, but with the inner pair shurter than the outer. 



Separated from hispanicus by the colour, the chaetota\y of the pronotum, 

 and the specialized series of bristles on tergite 8 in the male. 



Mab. Spain, Arnes (Tarragona), August 1912 (Navas), both sexes. 



Rydal Mount, Blaydon-on-Tyne. 

 January '2Stk, 1921. 



Gi/rinus urinator III. and G. bicolor Pk., 7te,tr Ca>nbrid(je. — On Decem- 

 ber 28th, 1920, I obtained a Gyrinus by casually sweeping the Vicar's Brook, 

 near Cambridge ; this on examination proved to be G. uriiiator 111. 

 Mr. Balfour Browne, to whom my thanks are due for the identification of 

 this and the following species, writes: " G. urinator has been recorded for 

 Northumberland, S. ; Yorkshire, N.E. ; on the East Coast; otherwise all 

 records in England are for the southern counties, except Hereford." Gyrinus 

 bicolor Pk. is quite common at Quy Eeii, near Cambridge. 1 took three 

 specimens there on January 4th, three others in April last. I am not aware 

 that this species has been recorded for Cambi'idgeshire before. — E. J. Pearce, 

 The Lodge, Corpus Christi College, Cambridge: February \st, 1921. 



A ^^ trap^^ for sap-frequentiny beetles. — During the last season I have 

 found a beetroot, preferably rather rottan, most efficacious as a bait for beetles, 

 especially for Ejmraea and kindred genera. This may be well known, but a 

 list of the species taken may be of interest: Epuraeu diffusa and delefa, Soronia 

 pimctatissiina and yrisea, Cryptareha imperialis, Ips <niadrij>unctafa, lihizo- 

 phriyus pariiUelocollis and perforatus. — G. IL A SHE, Hartlebury : Fell t/ftj ?/1921 . 



