184 



Enderlein (G.). Neue palaarktische Simuliiden. [New Palaearctic 



Simuliids.l — Sitzungsber. Gcs. naturf. Frcunde, Berlin, October- 

 December" 1920, no. 8-10, June 1921, pp. 212-224. [Received 

 29th August 1921.] 



Descriptions are given of the following new Simuliids (arranged 

 under numerous subgenera) : — Simnlmni augtcstifrons , from France, 

 5. tristigatum, from France and Spain, 5. hulgaricum, from Bulgaria, 

 S. lapponictim, from Lapland, S. heymonsi, from Norway and Finland, 

 5. fyabeatum, from Italy, S. jalcula, from Germany and England (of 

 which 5. angustitarsis, Edw., nee Lundstr., is said to be a synonym), 

 5. dahlgrilni, from Sardinia, S. tomosvaryi, from Germany, S. maUkics- 

 seni, from Germany and South Russia, S. peetsi, from Germany, 

 S. specularifrons, from Norway, S. wilhelmianum, from Germany, 

 5. angiistimanus , from Germany, 5. latimanus, from Germany and 

 England, S. schonbaueri, from Hungary, S. heidenreichi, from Germany. 

 5. alternans from Hungary, S. parvum, S. montanum, from Germany, 

 5. teniiifrons, from Germany, S. tenuimanus, from Germany and 

 Finland, 5. transcaspicum, from Transcaspia, and S. ochrescentipes. 



Stempell (W). Ueber das Vorkoramen von Anopheles im Bezirke 



des Jriiheren VII Armeekorps (hauptsachlich Westfalen). [The 



Occurrence of Anopheles in the District of the former 7th Army 



Corps (chiefly Westphalia).] — MiU. Zool. Inst. Westf. Wilhelms- 



Univ., Munsfer i. IF., no. 3, 5th August 1921, pp. 13-19, 1 fig. 



Collections made from 13th August to 29th October 1918, in 45 

 localities, showed that Anophelines occur everywhere — in some 

 places abundantly. Anopheles maculipennis was the most common, 

 A. bifnrcatiis being half as numerous, while A. plmnbens [nigripes) 

 was found at Dortmund only. 



Kreisel (C). Ueber den Einfluss von Sauerstoff, Kohlensaure und 

 Neutralsalzen auf Culieiden-Larven und -Puppen. [The Influence 

 of Oxygen, Carbonic Acid and Neutral Salts on Culicid Larvae 

 and Pupae.'' — MiU. Zool. Inst. Westf. Wil helms- Univ., Miinster i. 

 IF., no. 3, 5th August 1921, pp. 26-30. 



In further tests of the effect of neutral salts — the chlorides, nitrates 

 and sulphates of sodium, potassium, calcium and magnesium — on the 

 tracheal system of Culicid larvae [R. A.E., B, vii, 49; viii, 117], Cidex 

 pipiens, L., Theobaldia annidata, Schr., and Anopheles maculipennis, 

 Meig., were the mosquitos used. In this connection it is noted that 

 newly-hatched larvae of C. pipiens were taken at the end of December, 

 showing that this species can hibernate in this stage. 



The first experiments were made with larvae and pupae oi C . pipiens 

 placed in salt solutions in specimen glasses exposed to the air. The 

 mortality of the larvae amounted to 80 per cent., as against 25 per cent, 

 for the pupae, the higher figure being due to absorption through both 

 mouth and anus, whereas in the pupae only the skin is involved. 



In experiments in which pupae of C. pipiens were submerged in 

 pipe-borne water with a normal gas content, in distilled water with a 

 high content of COg or O2, and in solutions of neutral salts, it was found 

 that their age was immaterial. In pipe-borne water with a normal gas 

 content the length of life depends on the length of the tubes contain- 

 ing the liquid — all being of the same diameter — and was 80 minutes 



