This study examines the inventory of the arthropodological fauna of two humid zones in the Ouargla cuvette (Northern Sahara Algerian East) which are Hassi Ben Abdallah lake and the Sebkhet Sefioune lake. For a systematic inventory of species, different techniques are used. This inventory reveals a fauna which is rich of 151 species. These species are divided into 85 families, 11 orders and 3 classes (Ostrachoda, Arachnida and Insecta). The Insecta class is better represented with 9 orders grouping 74 families. It is followed by that of the Arachnida with 1 order counting 10 families. The Ostrachoda are the least represented with 1 order and one family. At the lake of Hassi Ben Abdallah, 90 species of arthropods are inventoried. They are distributed among 63 families. For Sebkhet Sefioune Lake and during the period from July 2014 to June 2015, 101 species are listed, spread over 59 families. It is noted that 39 species listed in 35 families are common to both lakes in Ouargla cuvette. However, 50 species are found only at Hassi Ben Abdallah Lake with 22 families, While 61 species are grouped into 19 families which are captured only at Sebkhat Sefioune Lake. This station has more species, but fewer families. However, it should be noted that the order Odonatoptera is absent at this lake. The proliferation in these two humid zones of an arthropodological fauna is better suited to the hypothesis of an improvement in trophic resources than to a direct action of climatic factors. Keywords: humid zones, Ouargla, Hassi Ben Abdallah lake, Sebkhet Sefioune lake, arthropods, arid zone.

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