In this research, the occurrence of Glycaspis brimblecombei Moore (Hemiptera: Psylloidea: Aphalaridae) was recorded for the first time on Eucalyptus camaldulensis (Myrtaceae) leaves in Syria. Where collected from the leaves and shoots of young and old trees of eucalyptus from Lattakia province in June 2015 in three sites. The morphological characters examined and compared with the specialized keys for this species. The results showed that the highest average for psyllid egg masses was in Bustan AlBasha on the lower surface of the leaves and amounted to 5.80±2.00 mass, had the highest average number of eggs in the same location and on the lower surface also reached 65.80±47.97 eggs / Leaf. The highest average number of nymphs under the Lerp in Bustan AlBasha on the lower surface of the leaves as stage as follows: L1: 18.4±9.51, and L2: 9.60±3.32, and L3: 6.40±0.92, while L4: 2.80±1.74 on the upper and lower surfaces. The highest average number of psyllid nymphs without white Lerp was for the first nymph L1: In Shahd Alaasal site on the Lower surface 3.40±0.87, and L2: at the same previous location on the upper surface of 5.80±2.43, and L3: in Bustan AlBasha site on the Lower surface 2.80±0.58, and L4: in Shahd Alaasal and Bustan AlBasha 0.20±0.20 on the upper and lower surface. The highest average number of adult in the site Bustan AlBasha on the upper surface of 1.40±1.16, and the lowest in the site Shahd Alaasal on the upper surface of 0.20±0.20.