894 CHARLES PAUL ALEXANDER 



which live in similar habitats should be considered. Howard, Dyar, and 

 Knab (1915:213) say, in describing these mosquitoes: 



These crab-hole inhabiting species possess peculiarly developed antennae in order, as we 

 suppose, to enable them to detect the approach of their crustacean host and fly out of the 

 hoi ?s before being overwhelmed in the water in the bottom by the incursion of the crab, 

 whose body must completely fill the entrance to the hole. 



It is curious and suggestive that the males of Polymera should likewise 

 possess elongated and very complicated antennae. 



Tribe Pediciini 



The Pediciini constitutes a small tribe which seems to be divisible into 

 two well-marked subtribes, the more generalized Adelphomyaria indicating 

 a relationship with the Hexatomini. 



The larvae of the Pediciini have the labrum broad and the epipharynx 

 usually feebly armed. The mentum is completely divided into two parts, 

 each half with not more than four, usually three, teeth. The hypopharynx 

 is labriform. The maxilla consists of two lobes, distinct and separate 

 in the Adelphomyaria, more or less approximated or fused in the Pedi- 

 caria. The mandible is powerful, ending in a strong apical point; the 

 cutting edge has about four teeth; there is a simple tuft of setae on the 

 prosthecal region in the Dicranotae and in Pedicia. The head capsule 

 is very elongate, massive, and compact, with the posterior incisions very 

 shallow. In the Adelphomyaria the cauda is surrounded by four lobes 

 which are fringed with exceedingly elongate hairs; in the Pedicaria there 

 are two ventral caudal lobes, each tipped with a very few setae. The 

 anal gills are four in number and are segmented, the terminal segment 

 being more or less retractile. In the Pedicaria prolegs are developed 

 on the abdominal segments of some of the genera. 



All of the species of the tribe, so far as is known to the writer, are 

 carnivorous in their larval state, which is spent in mud or earth close to 

 water. 



The two subtribes of the Pediciini may be separated as follows: 



Larvae 



Spiracular lobes four in number, fringed with very long, delicate hairs. 



Adelphomyaria (p. 895) 



Spiracular lobes two hi number, ventral in position, each tipped with from six to eight setae. 



Pedicaria (p. 899) 



