956 MOSQUITOES OF NORTH AMERICA 



backward, each composed of ten stout lamellse with curved tips. Mandibles 

 quadrangular, smooth; a long appendage before tip; an outer row of coarse 

 cilia; terminal dentition of four teeth, very large, ensiform, the third small, 

 a rudimentary fifth shown. Maxilla rounded quadrangular, excavate in the 

 middle ; basal angle with a group of flattened appendages with recurved tips ; 

 inner angle with shorter setse; palpus nearly separated by a suture, erect, 

 columnar, flat at tip, with rudimentary digits. Thorax rounded, about as wide 

 as long; lateral hairs short, very stout, the heaviest ones spinulose. Abdomen 

 stout, the segments angled at the sides, the anterior ones narrow and transverse ; 

 hairs moderately long, the lateral ones multiple. Eighth segment with a large 

 chitinous plate at the sides, bearing two stout spinulose hairs on its distal 

 margin. Air-tube stout, about three and a half times as long as broad, slightly 

 tapered, without pecten and with a multiple tuft close to base beneath. Anal 

 segment nearly as long as broad, ringed by the plate, which has a spinulose 

 apical margin ; dorsal tufts of two long brushes on each side ; a single spinulose 

 lateral hair; ventral brush well developed, the tufts with long feathering; anal 

 gills very short, bud-like. 



The larvae live in the water at the leaf-bases of Bromeliaceae and feed upon the 

 other mosquito larvae occurring therein. 



Island of Guadeloupe, West Indies. 



La Soufri^re, July 30, 1905 (A. Busck). 



We have only the single pair of specimens brought home by Mr. Busck. It 

 is probable that the species inhabits neighboring islands also. 



MEGARHINUS HYPOPTES Knab. 



Megarhina ferox Macquart (not Humboldt, not Wiedemann), M6m. See. roy. des 

 Scl., de I'Agr. et des Arts de Lille, 1844; Dipt, exot., Suppl., 1, 7, 1846. 



Megarhinus hypoptes Knab, Can. Bnt., xxxix, 50, 1907. 



Megarhinus trinidadensis Busck (not Dyar & Knab), Smiths. Misc. Colls., quart. Iss., 

 lii, 60, 1908. 



Megarhinus hypoptes Busck, Smiths. Misc. Colls., quart. Iss., lii, 60, 1908. 



Megarhinus hypoptes Theobald, Mon. Culic, v, 90, 1910. 



Obiqinai, Description of Meqabhintts hypoptes: 



Male: Head behind the eyes velvety-black, the eyes broadly bordered with light 

 metallic-blue, beneath and at the sides silvery. Antennae densely plumose; the 

 toruli with silvery lustre; second segment long and stout, longer than the three 

 succeeding ones, somewhat compressed laterally, the heavy scaling of the crest 

 condensed to a prominent iridescent blue patch on the anterior portion. Palpi 

 metallic-blue and purple, segments 2 to 4 pale lilac at the tip, second and fourth 

 segments nearly equal, the third longer, fifth twice as long as the fourth. Pro- 

 thoracic lobes deep metallic-blue. Mesothorax greenish-black on the disk, with a few 

 coppery scales intermixed; the anterior and posterior margins, an ill-defined median 

 line and patches at the middle of the sides metallic-blue. Scutellum and post-scu- 

 tellum bright metallic-blue. Pleura and coxse silvery. Abdomen above deep blue, 

 passing from greenish to a violaceous-tinge towards the tip, segments 6, 7 and 8 

 marked with gold at the hind angles, the seventh with a fine golden hind margin. 

 Claspers violet-scaled. Sixth and seventh segments laterally expanded, reaching 

 their greatest width at the tip of the seventh. No caudal tufts. Lateral abdominal 

 cilia pale on all the segments but the last, dark on the eighth and the genitalia. 

 Abdomen beneath yellowish-silvery, with a median blue stripe. The stripe is widest 

 on the third and fourth segments, and narrows to a fine line on the sixth and 

 seventh. £]ighth segment violaceous beneath, tipped with gold. Legs deep violet 

 and blue, the hind tarsi only white-marked. Under surface of the femora bright 

 brassy. On the hind legs the fourth and fifth tarsal joints are silvery-white on the 

 outer side, black on the inner. Length, 9.5 mm. (exclusive of appendages). 



Type.— Cat. No. 10,146, U. S. Nat. Mus. 



Locality. — Bluefields, Nicaragua. (W. F. Thornton.) 



