Little known chewing lice (Phthiraptera) infesting crab plover Dromas ardeola Paykull, 1805 (Charadriiformes: Dromadidae) from the Red Sea.

Scanty information is available for many species of chewing lice of marine birds. Through this work we investigated one of most characteristic marine bird for chewing lice. Seven individuals of crab plovers Dromas ardeola Paykull, 1805 were trapped using standard mist nets on Humr Island in Farasan Archipelago, Saudi Arabia.

Checklist and pictorial key to fourth-instar larvae of mosquitoes (Diptera: Culicidae) of Saudi Arabia.

The Kingdom of Saudi Arabia includes fauna from three zoogeographic regions: the Afrotropical, Oriental, and Palaearctic regions. To study the mosquito (Diptera: Culicidae) fauna of these regions in Saudi Arabia, larval collections were made at 15 sites during 2005-2006. Thirty-three species representing nine genera were found.

Acaricidal effects of cardiac glycosides, azadirachtin and neem oil against the camel tick, Hyalomma dromedarii (Acari: Ixodidae).

The cardiac glycoside, digitoxin, from Digitalis purpurea L (Scrophulariaceae), a cardiac glycosidal (cardenolide) extract from Calotropis procera (Ait) R Br (Asclepiadaceae), azadirachtin and neem oil from Azadirachta indica A Juss (Meliaceae) were tested for their effects against larvae and adult stages of the camel tick, Hyalomma dromedarii Koch (Acari: Ixodidae). The contact LC50 values of the first three materials against adults were 4.08, 9.