570 MOSQUITOES OF NORTH AMERICA 



j/aie,_Proboscis rather longer than the antennae. Palpi much longer than the pro- 

 boscis. Antennae with testaceous bands. Length of the body 3 lines; of the wings, 



5 lines. 



South America. 



Oeiginal Description of Janthinosoma arribalzag^ : 



Wings unspotted, densely black-scaled; unusually wide in proportion to their 

 length. Tarsi uniformly black-scaled, with the exception of a broad basal white 

 band on the fourth joint of the hind legs. Thorax sooty, clothed on the mesonotum 

 and scutellum, with short falciform, golden scales with numerous long stiff black 

 bristles on their margins. Abdomen, deep amethystine purple, with triangular 

 apical golden spots on each segment, and some yellow scales and hairs along the 

 hind border of the first; ventrally, the segments show triangular golden apical 

 markings. 



There can be little doubt that it was upon this species that Arribalzaga founded 

 his new genus, as it agrees entirely with his description, given below, while speci- 

 mens, sent to Mr. Theobald by Dr. Lutz, and which correspond to Walker's type of 

 C. dis crucians, though believed by the latter naturalist to be Arribaizaga's species, 

 were at once seen to fail to correspond with Arribalzaga's description and figure, 

 and it is obviously unlikely that the discrepancies can be due to careless drawing. 

 This diflSculty is now set at rest by a specimen I have just received from Dr. Lutz, 

 labelled " Janthinosoma, sp. n.," and which was at once recognized by Mr. Theobald 

 as the missing species. 



The head and appendages almost black, the vertex and nape clothed with erect 

 forked, and short falciform golden scales. The pleurae and coxae show extensive 

 areas of golden scales and the lower surfaces of the femora, and the base also above 

 of those of the hind legs, are bright golden, the apices of the femora showing also 

 a barely noticeable yellow knee-spot. 



This species can be easily distinguished from any other of the genus by the 

 single band on the hind tarsi. 



Originai, Description of Conchyliastes varipes : 



Near musicus, but the last joint of the hind tarsi is brown. Black, the front and 

 hind femora, except their broad apices, the posterior side of the middle femora except 

 their apices, and the stems of the halteres, yellow, the fourth joint of the hind tarsi 

 white; scales of palpi violaceous, those of the occiput yellowish white and with a 

 patch of violaceous ones on either side; (mesonotum abraded; what scales remain 

 are yellowish white and a few black ones along the middle) ; scales of abdomen 

 violet blue, those on sides of first two segments, hind angles of the others except the 

 last one, under surface of each segment except the last one and base of the preceding, 

 whitish; scales on yellow portion of femora yellowish white, those on the remainder 

 and on tibiae violet blue, those on the tarsi black except on the fourth joint of the 

 hind tarsi, where they are white, claws of front tarsi toothed; wings grayish hyaline, 

 veins and scales brown, petiole of first submarginal cell from two-fifths to three- 

 fifths as long as that cell, hind cross vein less than its length from the small; length, 

 4 mm. Five female specimens. Type No. 7341, U. S. N. M. 



Las Penas and Tonala, Mexico (Dr. A. Duges), and Agricultural College, Missis- 

 sippi (May 18, Glenn W. Herrick). 



Description of Female, Larva, and Egg of Psorophora discrucians (Male Un- 

 known) : 



Female. Proboscis moderate, slender, uniform, labellae conically tapered ; 

 vestiture of blue-black scales, setae very small, black, curved, those on labellse 

 small, prominently outstanding. Palpi about one-fourth as long as proboscis, 

 thick, uniform, clothed with violaceous scales and with rather small black setae. 

 Antennae slender, the joints subequal, pilose, blackish, rugose; second joint a 

 little longer and stouter ; tori subglobose, with a cup-shaped apical excavation, 

 blackish, shining, a patch of broad whitish scales on inner side ; hairs of whorls 

 moderate, sparse, black. Clypeus elliptical, shining, black, nude. Eyes bronzy 

 brown. Occiput short, convex, black, clothed with flat, broadly lanceolate 

 scales, silvery anteriorly in the middle and l)elow, yellowish posteriorly, a large 

 patch of dark blue ones on each side, a number of brownish or luteous erect, 

 forked scales on the nape ; setae rather small, black. 



Prothoracic lobes prominent, black, remote, with a number of flat sordid- 

 silvery scales and black seta?. Mesonotum black, clothed with narrowly lanceo- 



