164 Dyar and Knab* Sortie American Mosquitoes. 



the island of Trinidad. Mr. Urich secured the larvae, which are peculiar, 

 with a dense coat of fine long pile. They fall in our table with philosoph- 

 icus (Journ. N. Y. Ent. Soc., xiv, 190, 1906), but differ therefrom in the body 

 pile and the comb of the eighth segment, the scales of which are joined on 

 a basal plate. They occurred in a hollow tree at St. Anns, Trinidad. 



Specimens from Trinidad identified by Mr. Coquillett as " Haemogogus 

 allon.anilatus Theobald " are apparently this species. 



Aedes philosophicus Dyar & Knab. 



This name (Journ. N. Y. Ent. Soc., xiv, 195, 1906) is based on larvae from 

 Mexico and Salvador, which were identified as adults as " Haemagogus 

 equinus Theobald." We refused to accept this name as we could not find 

 the description. It exists, nevertheless (Entomologist, xxxvi, 282, 1903) ; 

 but the circumstance proves fortunate, for the specimens were wrongly 

 named. A. pJiilosopliicus has toothed claws in the female adult and ob 

 viously belongs to Dr. Lutz's genus Stegoconops, which we are unable to 

 recognize as distinct from Aedes. The species has faint silvery white bands 

 on all the abdominal segments above and thus superficially resembles 

 Haemagogus equinus Theobald, described from Jamaica; but that has 

 simple claws in the female, as Theobald expressly states. 



Aedes affirmatus sp. nov. 



Shining blue, like Haemagogus splendens Williston but the female with the 

 fore and middle tarsal claws toothed. Head and thorax clothed with metallic 

 blue scales, pleurae silvery white ; abdomen dark blue above, the first seg 

 ment with a white bar on each side, below with silvery white segmental 

 bands. Legs blue-black, middle and hind femora \\ith a silvery white spot 

 at tip, the middle femora narrowly white lined below, the posterior ones 

 very broadly so for the basal three-fourths. Base of first submedian cell 

 nearer apex of wing than base of second posterior cell. 



Four specimens, Santa Lucrecia, State of Vera Cruz, and Salina Cruz, 

 State of Oaxaca, Mexico ; Las Loras, near Puntarenas, and Rio Aranjuez, 

 Puntarenas, Costa Rica (F. Knab). 



Type. Cat, No. 10,023, U. S. Nat. Mus. 



The larva is unknown. 



Aedes mediovittata Coquillett. 



Stegomyia mediovittata Coquillett, Can. Ent., xxxviii, 60, 1906. 



Gymnometopa medlov'Mata Coquillett, Proc. Ent. Soc. Wash., vii, 183, 1906. 



Aedes mediovittata Dyar & Knab, Journ. N. Y. Ent. Soc., xiv, 196, 1906. 



Gymnometopa mediovittata Coquillett, Tech. ser. 11, Dept. Agr., Bureau 

 Ent,, 25, 1906. 



. Mr. Coquillett specified this species as the type of his genus Gymnome 

 topa, but later he defines the genus as having simple claws in the female, 

 and includes with mediovittata, sexlineata Theobald, albonotata Coquillett 

 and buscMi Coquillett, species actually with such claws. Mediovittata, how 

 ever, has toothed claws, so that Gymnometopa will thus become a synonym 

 of Aedes, the other associated species falling into Haemagogus. 



