954 MOSQUITOES OF NOKTH AMERICA 



Tapachula, State of Chiapas, Mexico (D. L. Crawford) ; Antigua, Guatemala, 

 September, 1902 (G. Eisen) ; Sonsonate, Salvador, August 30, 1905 (F. 

 Knab) ; Izalco, Salvador, August 31, 1905 (F. Knab) ; Eio Aranjuez, near 

 Puntarenas, Costa Eica, September 13, 1905 (F. Knab). 



MEGARHINUS GUADELOUPENSIS Dyar and Knab. 



Hfegarhinus violaceus Coquillett (in part, not Wiedemann), U. S. Dept. Agr., Bur. 



Ent, Tech. Ser. No. 11, 14, 1906 (male). 

 Megarhinus guadeloupensis Dyar & Knab, Smiths. Misc. Colls., quart, iss., xlviii, 247, 



248, 254, 1906. 

 Megarhinus guadeloupensis Theobald, Mon. Culic, v, 603, 1910. 



Obtoinal Description or Megabhintjs guadeloupensis: 



Female. — ^Head pearly green and blue above, silvery at the sides and beneath. An- 

 tennae very slender; the second segment not stouter and more than twice as long as 

 the third, without crest of erect scales. Palpi slender, cylindrical, violet, the apices 

 of the segments mauve; third segment laterally compressed, thickened at the apex, 

 nearly twice as long as the fourth ; fourth segment shorter than second. Prothoracic 

 lobes bright blue. Mesothorax metallic green and blue, the two colors of about equal 

 strength, the blue in a median line and at the sides. At the roots of the wings and 

 on the scutellum patches of bright, almost brassy, scales. Pleurae and coxae silvery 

 with a yellowish tinge. Abdomen passing from dull greenish through blue and 

 violet on the seventh segment to golden purple on the eighth. Eighth segment with 

 dark bristles. Ventral surface entirely golden. 



Legs deep violet, the femora golden beneath. Front tarsi unicolorous; middle 

 tarsi with the second segment white on the outside (3-5 missing); hind tarsi with 

 the fourth segment partly white. 



Male. — Antennae slender, sparsely plumose; the second segment but little stouter 

 than the following ones, slightly longer than the third and fourth together, without 

 crest of scales. Palpi long and slender; the second segment is a trifle shorter than 

 the third, the third and fourth are of nearly equal length, the fifth longer than these 

 two together. The coloration of the body is similar to that of the female. The legs 

 are entirely dark without a trace of white on any of the tarsi. 



Length, 5-7 mm. 



Type No. 9956, U. S. N. M. 



Locality: Guadeloupe, West Indies (A. Busck). 



1 ?, 1 d'. Bred from larvae found together in Bromelia water. The male is much 

 denuded. Mr. Coquillett's characterization of the male M. violaceus is based on this 

 specimen. The palpi are remarkably slender in this species, a particularly notice- 

 able feature in the female. Another unique feature is the absence of erect scales 

 on the second antennal segment in both sexes. 



Description of Female, Mam;, and Larva of Megarhinus guadeloupensis: 



Female. — Proboscis rather long, curved, tapering to a point. Palpi long, 

 rather slender, nearly two-thirds the length of the proboscis ; long joint rather 

 stout, compressed, clavate, with a constriction at basal two-fifths; penultimate 

 joint cylindrical, about two-fifths as long as the preceding; terminal joint 

 minute; vestiture deep violet, beneath dark golden scaled, apices of segments 

 bright metallic violet. Antennae filiform, very delicate, the joints subequal, 

 with whorls of sparse hairs ; second segment less than twice the length of the 

 following one and but little stouter, without dorsal crest of scales; tori deep 

 brown with silvery pruinosity. Clypeus transverse and broadly rounded, dark 

 brown with silvery pruinosity. Occiput covered with flat bright bluish-green 

 iridescent scales, ocular margins narrowly silver-white ; cheeks and head beneath 

 silvery scaled. 



Prothoracic lobes very prominent, covered with bright metallic blue scales 

 and bearing a few coarse black sete. Mesonotum clothed with small deep 

 brown scales on the disk, a median stripe metallic-blue, lateral margins broadly 

 light greenish-blue and subdorsal stripes of greenish scales becoming confluent 

 veith the lateral margins in front, posteriorly the blue scales diffused over entire 

 surface ; patches over roots of wings bright greenish-silvery. Scutellum clothed 



