850 MOSQUITOES OF NOETH AMERICA 



Howardina walkeri Blanchard, Les Moustlques, 416, 1905. 



Howardina walkeri Theobald & Grabham, Mosq. or Culic. of Jamaica, 20, 1905. 



Aedes tcalkeri Dyar & Knab, Journ. N. Y. Bnt. Soc, xiv, 192, 1906. 



Howardina walkeri Coquillett, U. S. Dept. Agr., Bur. Ent, Tech. Ser. 11, 26, 1906. 



Hwmagogus walkeri Dyar & Knab, Proc. Biol. Soc. Wash., xix, 166, 1906. 



Howardina walkeri Theobald, Mon. Culic, iv, 215, 1907. 



Howardina walkeri Theobald, Mon. Culic, v, 220, 1910. 



Original Descbiption of Culex (Stegomyia?) walkeri: 



Thorax chestnut-brown, with a broad greyish-white scaled area on each side of 

 the mesonotum. Fore and mid legs apparently unhanded, pale at the base of the 

 femora; base of the metatarsi and first two tarsal joints of the hind legs banded 

 with white. Abdomen brown, showing traces of white basal banding. 



Length. 4 mm. 



HaMtat. Jamaica. 



Observations. The above is a note I made on a specimen in the old collection at 

 the British Museum, labelled C. fasciatus, F. It is certainly not fasciatus, and is 

 quite distinct from any known species. Nothing approaching it has been received 

 from the West Indies. It is in poor condition, and is probably a Stegomyia; the 

 marked thoracic ornamentation should at once render its identity easy. If a true 

 Culex its position in the table would be after C. Japonicus, mihi. The head and 

 scutellum are too damaged to say definitely to which genus it belongs, so it is placed 

 provisionally in Culex. 



Description of Female, Male, and Larva of Aisdes walkeri: 



Female. Proboscis rather long, subcylindrical, uniform; vestiture black; 

 sete minute, curved, black, those on labellae more prominently outstanding. 

 Palpi about one-fifth the length of the proboscis, slightly thickened with scales 

 at the tip; vestiture black, tips silvery -white. Antennae filiform, the joints 

 subequal, rugose, black, with long pilosity; second joint slightly thickened 

 towards apex, pale at base ; tori subspherical, with a cup-shaped apical excava- 

 tion, ochraceous ; hairs of whorls sparse, rather long, brown. Clypeus elliptical, 

 prominent, dark brown, nude. Eyes black. Occiput clothed with flat ap- 

 pressed scales, a rather narrow area of narrow curved ones along median line, 

 black, a rather broad, silvery-white median stripe continued forward between 

 eyes, a broad lateral yellowish-white area extending to cheeks and inclosing a 

 small, black, lateral spot on ocular margin ; some upright forked pale scales well 

 back on the nape ; bristles along margins of eyes black, none projecting forward 

 between eyes. 



Prothoracic lobes elliptical, remote dorsally, bro^vn on upper angle, densely 

 clothed with large, broad silvery-white scales and with dark bristles. Meso- 

 notum deep brown, clothed with narrow, curved scales, dark blackish-brown on 

 the disk, two narrow, longitudinal golden-yellow lines, discontinued before ante- 

 scutellar space and followed from that point by a single broader silvery line 

 across antescutellar space, a narrow golden line on each side of antescutellar 

 space running forward to middle of disk, sides of mesonotum broadly silvery- 

 white scaled, broadest on anterior third; bristles over roots of wings pale 

 golden. Scutellum trilobate, pale brown, clothed with blackish-brown scales, 

 middle lobe with a narrow central silvery-white line continuous with that on 

 mesonotum, each lobe with a group of pale golden bristles. Postnotum elliptical, 

 prominent, nude, brown, with a slight pruinosity. Pleuras and coxse luteous, 

 clothed with patches of flat elliptical silvery-white scales ; bristles small, pale. 



Abdomen subcylindrical, tapering posteriorly, sixth and seventh segments 

 somewhat expanded apically beneath ; dorsal vestiture of greenish-black scales, 

 with rather broad bands of dull yellow scales at bases of segments, broadest 

 medianly, laterally abbreviated on second and third segments, on succeeding seg- 

 ments touching the lateral spots, last two segments with silvery basal bands ; a 

 series of large, lateral, segmental, triangular silvery-white patches, showing in 

 a dorsal view on the posterior segments ; first segment black scaled, with many 



