240 MEDICAL ENTOMOLOGY 



bands. Costa black with two white spots. A large dark species widely 

 distributed in Queensland. 



Anopheles (sensu restricto) corethroides, Theobald. Palpi dark brown 

 and unhanded. Thorax pale brown with a large median dark area in 

 front. Abdomen deep brown. Legs brown and unhanded. Costa with- 

 out any spots. This species is found in South Queensland. 



Anopheles (sensu restricto) atratus, Skuse. Palpi dark, with light 

 patches at the apices. Costa with six dark spots. Legs unhanded. It 

 is found in South Queensland. 



ARABIAN SPECIES OF ANOPHELES 



Anopheles (sensu restricto ?) arabiensis, Patton. Palpi with three white 

 bands, the distal one including the apex. Thorax brown. Abdomen 

 clothed with brown hairs. Legs dark brown with yellowish bands at 

 all joints. Costa with seven dark spots, four long and three short. 

 Egg boat-shaped, frill well marked, the floats not encroaching on it. 

 Larva with simple and unbranched frontal hairs ; palmate hairs present 

 on the second to the seventh segments ; the leaflet is long and serrated, 

 the filament long and pointed. 



This species is extremely common in the Aden Hinterland, breeding 

 in pools and along the edges of the smaller rivulets ; it is also common 

 near Sheik Othman, nine miles from Aden, where it breeds in wells. 

 It was found by the senior author to be naturally infected with the sporo- 

 zoits of the parasite of malaria. Mr. Theobald states that it does not 

 belong to any of his genera, but up to the present he has not created a 

 new genus for its reception. The type of this species and of the others 

 described below were unfortunately lost with some baggage in the Aden 

 Hinterland. 



Anopheles (Myzomyia) d'thali, Patton. Palpi with two white bands. 

 Thorax yellowish brown. Abdomen greenish with dark patches. Legs 

 brown, faint bands at all the joints. Costa with four black spots, the 

 basal one the longest. Egg boat-shaped with a narrow frill deeply 

 encroached upon by the floats, which almost meet in the middle line. 

 Larva with simple and unbranched frontal hairs ; palmate hairs well 

 developed from first to seventh segments ; leaflet long and serrated more 

 on one side than the other, filament long. Mr. Theobald thinks it is 

 Anopheles nili. 



Anopheles (Nyssorhynchus) tibani, Patton. Palpi with three white 

 bands, the apical one broad and sometimes divided into two. Thorax 

 dark with silvery scales. Abdomen clothed with dark hairs. Legs dark 



