INTRODUCTION<strong>St</strong>udies on odonata <strong>of</strong> the <strong>Lesser</strong> <strong>Antilles</strong> have begun in 2000 in order to increase knowledge onspecies biology, ecology and biogeography. <strong>The</strong> L’Herminier Natural History Society and the NantesMuseum <strong>of</strong> Natural History carried out several studies in Guadeloupe, Martinique, Dominica, <strong>St</strong>Vincent and Grenada since 2000 and a book on the Dragonflies <strong>of</strong> the <strong>Lesser</strong> <strong>Antilles</strong> is actually inprogress. Recent data from the <strong>Lesser</strong> Antillean islands were greatly needed in order to understandthe biogeography <strong>of</strong> the <strong>Lesser</strong> Antillean Dragonflies. Where the species did came from? What isexactly the dragonfly fauna composition? <strong>The</strong>se questions remain to be solved.This is why an intensive survey <strong>of</strong> <strong>St</strong> <strong>Lucia</strong> was carried out from March 9th to March 30th 2011. Thisstudy was financed by both the L’Herminier Natural History Society (LHNHS). Our primary aim was toupdate the checklist <strong>of</strong> species, since only two papers are known to us concerning the dragonflyfauna <strong>of</strong> the island (Klots, 1932; Sibley, 2009). Fred Sibley spent few days in <strong>St</strong> <strong>Lucia</strong> where hecollected 21 species.Our major aim was to point out the distribution <strong>of</strong> species to establish distribution maps, in a way toobtain information on the conservation status <strong>of</strong> species.Generally speaking, a checklist <strong>of</strong> species must be considered as a tool for conservation matters. Datagathered on both ecology and biology on the field are intended to allow us to estimate theconservation status <strong>of</strong> species and their habitats, and then to apply the correct conservatorymanagement.
MATERIAL AND METHODS<strong>The</strong> Island was prospected during three weeks (march 9 to March 29) in a way to survey the most <strong>of</strong>aquatic habitats. <strong>The</strong> most <strong>of</strong> adults were caught with an aerial net. Exuviae were collected alongwith adult stage. Dragonflies larvae lives under water and after several numerous molts, reachmetamorphosis. Emergence take place out <strong>of</strong> water and remains the skin <strong>of</strong> the larva, called exuvia.Collecting exuviae (Fig.1) provides a good idea about odonatebreeding habitats. For each species a minimum <strong>of</strong> two pairswere caught, to constitute a reference collection in the NMNHand to try to answer taxonomic problems concerningneotropical species.Identification <strong>of</strong> species was first realized on the field, and inFrance, specimens were closely checked and named with thehelp <strong>of</strong> the NMNH collection and specialized books.<strong>St</strong>ations were first located on a map, and chosen after theiraccessibility and their repartition on the Island. <strong>The</strong> objectivewas to explore the island the most homogeneously as possible.We decided to separate <strong>St</strong> <strong>Lucia</strong> in three parts (north, south,center) and to spend one week by part. Localities cited by FredSibley were not visited. We considered that the data wererecent and we preferred to conduct our researches in unknownsites. Geographical data were completed with a GARMIN GPS(GPSMAP 60 CSx ). A protocol was developed to describe similarly the habitats <strong>of</strong> each station : lenticor lotic aquatic habitat, depth, length, width, vegetation… and we noted the number and the sex <strong>of</strong>species present. To describe more precisely aquatic habitats we also collected some plants with Mr.Leroy <strong>St</strong> Louis's permit. <strong>The</strong> herbarium was described at the museum. In order to maximize thechance to see the totality <strong>of</strong> species living in the surveyed localities we spend between 30 minutes toone hour by station.Projection datum is UTM zone 20N/WGS84.We surveyed 76 stations, distributed as follows :Localities surveyedExuviae <strong>of</strong> Orthemis macrothemis(C.POIRON, 2011).Vieux-Fort parish X UTM Y UTMSLU001 Vieux-Fort Police divisional headquarters, ditch 721771.3432 1518805.04SLU002 Hewanorra airport, ditch near the pists 722127.0639 1519591.94SLU003 Pointe des sables, ditch 722687.4307 1519425.19SLU004 Anse de Sables, river mouth 722277.1778 1518691.3SLU005 Builder's choice, canal 722088.3503 1518844.62SLU006 Charlery's inn, swamped canal 721293.3446 1519038.91SLU007 Jetty 1, littoral trail, xerophile area 720527.9287 1518720.72SLU008 Jetty 2, temporary pond near a quarry 720418.1667 1518693.97SLU020 Grace, river 719129.1189 1523819.69SLU021 Warwick, affluent <strong>of</strong> the river Piaye 718070.9338 1527254.23SLU022 Daban, trail in banana plantation 718351.3861 1527555.38