23 INSECUTOR INSCITI^ MENSTRUUS 



it identical with declarator. It should be noted, however, that 

 the dorsal bare lines are less distinct in the specimens of 

 virgultus than in declarator from Surinam. 



Culex microsquamosus Grabham. 



The male type has no abdomen. There are three good 

 mounts of three males from Dr. Grabham, Jamaica. All three 

 factor Dyar and Knab. 



Culex nigripalpus Theobald. 



Originally described from a male from St. Lucia. This 

 male has disappeared from the collection. Later Theobald 

 mentioned a second male from Barbados. This male is in the 

 collection and bears the type label. It is a specimen of Culex 

 factor Dyar and Knab. 



Microculex argenteoumbrosus Theobald. 



This is identical with Cidex imitator Theobald. 



Genus PSOROPHORA Robineau-Desvoidy 



Psorophora sayi Dyar and Knab. 



Howard, Dyar and Knab consider sayi different from posti- 

 catus and describe sayi the North American species with a 

 yellow venter and posticatus the Central and South American 

 species with a yellow venter with basal violet bands. There is 

 no difference in the genitalia. We think there is only one 

 species, the name of which should be posticatus Wiedemann. 

 The violet ventral bands of the abdomen are often very indis- 

 tinct in South American specimens, and may even be absolutely 

 absent as in specimens sent by Austen to the British Museum 

 from the Lower Amazon. 



Psorophora albipes Theobald. 



We can confirm the identity with Psorophora Intzi Theobald. 



Psorophora neoapicalis Theobald. 



This is the South Brazilian form of cingidatus Fabricius. 

 Male genitalia : Side pieces more than twice as long as wide, 

 conically tapered, apical lobe prominent, triangular, basal lobe 



