600 MOSQUITOES OF NORTH AMERICA 



of the thoracic ornamentation given by Theobald (Mon. Culic, iii, 260, fig. 137) 

 ie entirely misleading as it shows a well-defined pattern. Such is not the case : 

 not only are the markings of silvery scales very diffused, but their distribution 

 is also very different. We have figured the mental plate of the larva in this 

 work, vol. 2, pi. 142, fig. 614, under the name Psorophora indoctum. Dyar and 

 Knab at first applied the specific name scholasticus, furnished them by CoquU- 

 lett, to this species. It developed later that this determination resulted through 

 an error in the association of adults and larvae, the adults proving to be Culex 

 similis, while the larvae were those of this species. CoquUlett added to the con- 

 fusion by referring to the genus Grabhamia the wrongly associated adults of 

 Culex (U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 21, 1906). 



PSOROPHORA PYGUffiA (Theobald). 



Ora&/iamta pygmwa Theobald, Mon. Cullc, Iii, 245, 1903. 



Culex nanus Coquillett, Can. Ent., sxxv, 256, 1903. 



Culex nanus Pazos, Bull. Soc. Ent. France, 134, 1904. 



Taniorhynchus antigtus Giles, Journ. Trop. Med., vii, 382, 384, 1904. 



Culex naniLS CoflSn, In Shattuck, The Bahama Ida., 284, 1905. 



Oralihaniia pygmcea Theobald and Grabham, Mosq. or Culic. of Jamaica, 31, 1905. 



Oratliamia pygmma Blanchard, Les Moust, 397, 1905. 



Culex nanus Blanchard, Les Moust, 629, 1905. 



Toeniorhynchus antiqum Blanchard, Les. Moust., 631, 1905. 



Janthinosoma pygmwa Dyar & Knab, Proc. Biol. Soc. Wash., xix, 162, 1906. 



Cfraihamia pygmmus Coquillett (in part), IT. S. Dept. Agr., Bur. Ent, Tech. Ser. 11, 



21, 1906. 

 Grathamia pygmwa Theobald, Mon. Culic, iv, 289, 1907. 

 Aedes pygmeus Pazos, San. y Ben., ii, 47, 318, 1909. 

 OraXihamia pygmwa Theobald, Mon. Culic, v, 281, 1910. 



OBieiNAL Descbeption of Gbabhamia ptom^a : 



Differs from the former [Graihamia jamoicensis] in the following characters: 

 Thorax mottled with dark brown, bright brown, and creamy scales, the dark brown 

 forming more or less distinct spots and a median line in front; the metatarsi show 

 no traces of median banding; there is no trace of the small black spot at the base of 

 the third long vein, and the wing scales are shorter and rather broader, and the 

 specimens are about half the size of Jam,aicensis. The apical bands on the abdomen 

 are as in the former species, but are much whiter. 



The wing is as follows: Fork-cells short, the first sub-marginal a little longer 

 and narrower than the second posterior; base of the first sub-marginal cell about 

 level with the base of the second posterior cell; stem of the first sub-marginal cell 

 a little more than half the length of the cell; stem of the second posterior nearly 

 two-thirds the length of the cell; posterior cross-vein about its own length behind 

 the mid cross-vein; elongate lateral scales on the apex of the first, the third, fourth, 

 and fifth veins; broad ones elsewhere. 



Ha1)itat. — Antigua (Forrest); and Jamaica (Grabham). 



Time of capture. — August (Forrest); March (Grabham). 



Observations. — Described from a series sent by Mr. Forrest The rather short and 

 broad wing scales on the branches of the second fork-cell and its stem are shown 

 in Plate XI. 



OBieiNAL Description or Culex nanus : 



Female. Near jamaicensis, but much smaller, the light-coloured scales on the 

 tibiae not collected into spots, mesonotum without round spots of yellowish scales, 

 etc. Black, the base of the antenna except the first joint a band at middle of 

 proboscis, the halteres and bases of femora yellow; scales and hairs of palpi black, 

 appressed scales of occiput golden yellow, Uie upright ones black, scales of meso- 

 notum golden yellow, those of the abdomen black and with a broad crossband of 

 whitish ones on the hind margin of each segment the last two segments nearly 

 wholly whitish scaled; scales of venter white, those of femora and tibiae mixed black 

 and whitish, the latter forming a ring near three-fourths the length of each femur, 

 scales of tarsi black, those at narrow bases of the Joints whitish, tarsal claws simple; 

 wings hyaline, the scales mixed black and white, the black ones not collected into 

 spots, lateral scales of the anterior veins narrowly lanceolate, those of the other veins 



