872 MOSQUITOES OF NOKTH AMERICA 



Time of capture. August (24th). 



Ohservations. — ^Described from a single perfect specimen. Dr. Grabham took this 

 brilliant species feeding on a horse. He took two specimens, and mentions that 

 " it is by far the most brilliant species found here, and evidently uncommon." It 

 was taken at 7 p. m. at the lower end of Old Pound Road. It resembles H. cyaneus, 

 Fabricius, but the venation is different, the first submarginal cell being smaller, 

 and having its base nearer the apex of the wing, whilst in cyaneus it is nearer 

 the base; moreover, the abdomen is adorned. It also approaches B. anomaculatus, 

 Theob., but the abdomen has not the curious chaetotactic characters seen in that 

 species and is banded, not having the two median spots seen in aWomaculatus. 

 The three species of Hcemagogus tabulate as follows: 

 A. Abdomen unadorned. Base of first submarginal cell nearer base of wing 

 than the base of the second posterior cell. . cyaneus, Fab.= 



splendens, Willis. 

 AA. Abdomen adorned. 



a. Base of first submarginal cell nearer apex of wing than that of 



posterior cell. 

 &. With prominent chsetse and two median basal white spots 



anomaeulatus, Theob. 

 66. No prominent chaetae, but basal white bands and a white oblique 



stripe on each side of first segment equinus, Theob. 



OeIOINAI, DESCEIPTION op AeDES PHttOSOPHICUS : 



The characters are indicated in the table. It was collected by the junior author 

 at Tehuantepec, Salina Cruz, Acapulco, Mexico, and Sonsonate, Salvador. The 

 specimens were named " Hcemagogus equinus Theobald " by Mr. Coquillett, but we 

 are unaware that any species has been so named. The Culex equinus of Linnaeus 

 and Fabricius Is said to be probably a SimuUum. 



The following is an abstract of the table : 



1. Air tube with the tuft beyond the pecten 8 



8. Pecten of the air tube with evenly spaced teeth 13 



13. Comb scales few, in a single or irregularly single row 14 



14. Anal segment not ringed, at least a small space along ventral line. 18 

 18. Comb scales long, pointed, thorn-shaped philosophicus 



Obiginai. Description of Abdes atfirmatcs : 



Shining blue, like Hwm,agogus splendens Williston, but the female with the fore 

 and middle tarsal claws toothed. Head and thorax clothed with metallic blue 

 scales, pleurae silvery white; abdomen dark blue above, the first segment with a 

 white bar on each side, below with silvery white segmental bands. Legs blue-black, 

 middle and hind femora with a silvery white spot at tip, the middle femora narrowly 

 white lined below, the posterior ones very broadly so for the basal three-fourths. 

 Base of first submedian cell nearer apex of wing than base of second posterior cell. 



Four specimens, Santa Lucrecia, State of Vera Cruz, and Salina Cruz, State of 

 Oaxaca, Mexico; Las Loras, near Puntarenas, and Rio Aranjuez, Puntarenas, Costa 

 Rica (F. Knab). 



Type.— Cat. No. 10,023, U. S. Nat. Mus. 



The larva is unknown. 



Descbiptioit op Female, Mam:, and Laeva of H^magoghjs equinus: 



Female. — Proboscis long, slender, subcylindrical, uniform, labellae conically 

 tapered ; vestiture deep violet-blue ; setae minute, curved, black, those on labells 

 more prominently outstanding. Palpi small, about one-sixth as long as the 

 proboscis; vestiture deep violet-blue, with a few moderate setse. Antennae 

 filiform, the joints subequal, rugose, coarsely pilose, brown ; second joint slightly 

 thickened towards apex and with a few small scales ; tori subspherical, with a 

 cup-shaped apical excavation, black, with a few minute hairs on inner side. 

 Clypeus rounded triangular, prominent, convex, black, shining, nude. Eyes 

 black. Occiput clothed with broad, flat metallic-blue scales, a white margin 

 along the eyes, cheeks white ; setae along margins of eyes moderate, black. 



Prothoracic lobes large, closely approximate dorsally, collar-like, clothed 

 with broad, flat metallic blue scales above, white ones on anterior edge and 

 below, a few stifE black bristles on apical margin. Mesonotum black, clothed 

 with elliptical, flat, metallic blue scales with green and olivaceous reflections; 



