A new species of pteromalide Spathopus sp. n. was collected with entomological net in a field of lucerne near the village Vulcanesti at 12.VII.2007 (2♀♀) and 1♀ at 20.VII.2008 in Codrii Reserve on the same crop. At the same time this species was collected by prof. Ionel Andriescu and Mircea Mitoiu in eastern Romania. To emphasize this species as new for science were analyzed the collected specimens with literature data to other 3 palearctic species existing in this genus: Spathopus montanus, Spathopus nasalis, Spathopus hofferi and with Ecrizotes monticola that has as many similarities. Table 1. The comparative analysis of genus Spathopus Ashmead Spathopus montanus Spathopus nasalis Spathopus hofferi To highlight the morphological characters that distinguish it from all the above mentioned species were prepared the microscopic preparations of anterior wing and antenna (fig.1), but to the head, thorax and abdomen were done microphotographs with scanning electron microscope (fig.2). After the detailed analyzing on the base of the drawings and the photographs from the literature (tab. 1) and microscopic preparations and photomicrographs made on specimens collected in these localities were highlighted the morphological characters separating it from the rest species namely: antenna with funicular Segment 3 very thin (figure 1), what is not observed to other species even if the funicular segments of Spathopus hofferi are strongly transverse. The second character is the postmarginal vein of the anterior wing is shorter than the stigma, contrary to the above mentioned species. Fig. 1 Spathopus sp.n ♀., antenna, anterior wing Fig. 2 Spathopus sp. n., head, thorax In conclusion should be noted that this genus is new for fauna of Republic of Moldova but the species is new for science.