214 MOSQUITOES OF NOKTH AMERICA 



bronzy brown-scaled above, pale-scaled beneath to near the apex. Tibiae and tarsi 

 uniformly bronzy brown-scaled. Claws simple. Length, 2.5 mm. 



Mai^ — Antennse much longer than in the female, the hairs of the whorls slightly 

 longer. Proboscis longer, slightly enlarged towards the apex. Abdomen compressed 

 basally, enlarged towards the tip, the claspers large and stout. Coloration as in the 

 female; claws of the fore and middle legs equal, one claw with a long basal tooth. 

 Length, 2 mm. 



Two specimens, bred from larvae in crab-holes, Corozal, Canal Zone, Panama, and 

 Coscojar River, Porto Bello Bay, Panama (A. H. Jennings). 



Type no. 12052, U. S. N. M. 



This genus is allied to Deinocerites, differing in the reduced length of the second 

 antennal joint. It is a more ancestral form in this respect. 



Desceeption of Femai^ and Maxe of Dinaitamesus spanius (Lakva Unknown) : 



Female. — Proboscis moderate, swollen at apex ; vestiture black, with a bronzy 

 reflection ; setae small, black, dense towards apex, those on labeUae more promi- 

 nently outstanding. Palpi short, one-seventh as long as proboscis, clothed with 

 bronzy scales and with a few outstanding brown setae. Clypens rounded tri- 

 angular, blackish, nude. Eyes black. Antennae rather long, with coarse pu- 

 bescence, hairs of whorls moderate ; tori subspherieal, with a cup-shaped apical 

 excavation, luteous brown, darker within ; second joint long, cylindrical, about 

 eight times as long as wide, nearly twice as long as the third joint, the succeed- 

 ing joints gradually shorter. Occiput blackish, clothed with narrow, curved 

 bronzy-brown scales on the vertex, sides and margin of eyes with broader pale 

 scales with metallic luster; many erect, broadly wedge-shaped light bronzy- 

 brown scales with shallowly emarginate tips on vertex; a row of black bristles 

 along margin of eyes. 



Prothoracic lobes elliptical, remote dorsally, small, clothed with broad, flat 

 bronzy-brown scales and black bristles. Mesonotum dark brown, a pair of 

 narrow impressed bare lines on the anterior half; vestiture of rather coarse, 

 narrow, curved bronzy-brown scales and with subdorsal rows of sparse, very long 

 and coarse brown setae, most abundant anteriorly and on posterior half. Scu- 

 tellum trilobate, the mid lobe greatly produced, three times as long as the side 

 lobes, vestiture similar to that of mesonotum, each lobe with a group of black 

 bristles. Postnotum elliptical, prominent, with a median ridge, dark brown, 

 nude. Pleurae and coxae blackish brown, with a patch of bronzy-brown scales on 

 mesopleurae and with rows of brown bristles. 



Abdomen subcylindrical, blunt at tip, ends of segments with coarse brown 

 bristles, cerci small, subcorneal, hairy, the last segment with a fringe of bristles ; 

 vestiture dorsally dull brown, beneath paler and with a submetallic luster; first 

 segment with fine brown setae dorsally. 



Wings moderate, hyaline ; petiole of second marginal cell about one-third the 

 length of its cell, that of second posterior cell a little longer than its cell ; basal 

 cross- vein more than its own length distant from anterior cross-vein; scales of 

 veins broadly ligulate, those on forks of second vein somewhat triangularly 

 widened, bronzy brown, with a blue refiection on the costa; fringe ample, of 

 broadly lanceolate scales. 



Legs moderate, femora of middle pair broad, flattened ; vestiture of bronzy- 

 brown scales, femora with a pale submetallic shade beneath to near apex. Claw 

 formula, 0.0-0.0-0.0. 



Length : Body about 3.5 mm. ; wing 2 mm. 



Male. — Proboscis straight, long, slender at the base, gradually but distinctly 

 thickened towards the tip. Antennae long, without short joints, coarsely pu- 

 bescent, hairs of whorls sparse, but longer than in female, second to fifth joints 

 with a secondary whorl of shorter hairs near middle ; second joint about nine 

 times as long as wide, third joint more than half as long as second, succeeding 



