Dyar and Knob Some American Mosquitoes. 165 



We have described the very peculiar larvae of this species. 



Aedes podographicus sp. nov. 



d 1 . Thoracic ornamentation similar to the?. Thorax black, silvery 

 scaled on the sides before the wings. $ . First joint of middle tarsi white, 

 a black spot at the middle, not black, white at the ends. 



This is the Central American form referred to by us as Aedts insolita 

 Coquillett under Mr. Coquillett's determination (Journ. N. Y. Ent. Soc. xiv, 

 203, 1906), but it appears from a nice bred series sent us by Mr. F. W. 

 Urich, that insolita (which was described from Trindad) is the female of 

 the species of which Verrallina laternaria Coquillett is the male, the sexes 

 being dimorphic. The species will be known as insolita Coquillett. In 

 podographicus the sexes are monomorphic. 



The larvae were separated by us on the shape of the antennae; but as 

 this character is rather indefinite, it will be better to change the table, 

 omitting the dichotomy 40, placing podographicus with insolita under 44, 

 and separate them by the shape of the pecten of the air tube as shown in 

 our figures 17 and 20, figure 17 representing insolita and figure 20, podo 

 graphicus. 



Localities as given by us under Aedes insolita ( Verralina insolita Dyar & 

 Knab, not Coquillett). Sonsonate, Salvador may be considered the type 

 locality. 



Type. Cat. No. 10,016, U. S. Nat. Mus. 



GENUS HAEMAGOGUS WILLISTON. 



Haemogogus Williston, Trans. Ent. Soc. Lond., 271, 1896. 



Howardina Theobald, Mon. Culic., iii, 287, 1903. 



Gualteria Lutz, Imprensa Medica (species No. VI), 1905? 



Gymnometopa Coquillett (in part), Proc. Ent. Soc. Wash., vii, 183, 1906. 



Cacomyia Coquillett, Tech. ser. 11, Dept. Agr., Bureau Ent., 16, 1906. 



The genus Haemogogus will have to be recognized on adult characters if at 

 all ; the larvae do not sharply differentiate themselves from Aedes. We take 

 this to be a group specialized off from Aedes, the tarsal claws of the female 

 having lost the tooth. The small end joint of the palpus is retained, which 

 differentiates the genus from Culex. We add to the genus, as used by 

 Theobald, Hou-ardina and Gymnometopa (all but the type species), which 

 differ in ornamentation, but agree in other respects. Cacomyia was pro 

 posed by Coquillett for albomaculata Theobald and equinus Theobald, on 

 the venational characters used by Theobald to separate the species. We 

 agree with the English author that these are not of generic value. The 

 other characters adduced by Coquillett from specimens before him are 

 fallaceous, for he had before him neither albomaculatus nor equinus, the 

 specimens he had so identified being, as to the former, Aedes capricornii 

 Lutz and Aedes offirmatus Dyar & Knab; &stoihe]atter,Aedesphilosophicus 

 Dyar & Knab, all with toothed claws, in contradiction of Theobald's ex 

 plicit statement to the contrary. We presume that the three species placed 

 by Dr. Lutz in his genus Gualteria belong here, though we have not seen 

 authentic specimens. G.fulvithorax is stated to have simple claws, but of 



