Sept., I9I4-] Alexander: Tanypremna and Megistocera. 217 



Female, length, 14.3 to 15 mm.; wing, 16 to 16.4 mm. 



Fore leg, femur, j.y mm.; tibia, 8.6 mm.; metatarsus, 8.1 mm. 

 Middle leg, femur, 11.5 mm.; tibia, 10.6 mm.; metatarsus, about 



24 mm. 



Hind leg, femur, 10.5 mm. ; tibia, 8.8 mm. ; metatarsus, about 



25 mm. 



Frontal prolongation of the head short, light brown, the nasus pale 

 with the apical brush of hairs dark, palpi black. Antennae with the 

 basal segments light yellow, the flagellar segments brownish black. 

 Front dull yellowish brown, the vertex and occiput grey. 



Mesonotum brownish grey, the lateral margin of the prsescutum 

 paler grey bordered interiorly by a narrow blackish line which is 

 waved at the pseudosuture ; scutum brownish grey with a brown 

 blotch on each lobe ; scutellum pale brown, on the sides dark brown 

 and more shiny ; postnotum light brown, more fuscous laterally. 

 Pleurae pale yellowish brown with a whitish bloom; a rounded shiny 

 black spot at the dorso-cephalic angle of the mesoepisternum. 

 Halteres pale brown, the knob dark brown. Legs with the coxae pale, 

 the outer faces somewhat browned. Wings whitish, veins brown; 

 stigma conspicuous, oval, brown. Venation as in fig. 5. 



Abdominal tergites dark brown, the extreme lateral margins 

 broadly pale, the dorsum variegated with paler, the basal segments 

 being paler medially, the apical four or five segments with the pale 

 spots in two rows one on either side of the middle line; sternites pale. 



Distribution. — Florida, Lake Okeechobee ; report by Mr. C W. 

 Johnson from the Mus. Com. Zool., I have examined this same speci- 

 men on two different occasions and there can be no doubt as to the 

 identity. Little River; Nov. 30, 1912, one male found in a spider's 

 web by Mr. Knab. Cuba, Macquart's type. Porto Rico (Roder), 

 Trinidad, June 13. Two males, three females, taken by August 

 Busck; U. S. National Museum. British Guiana, Bartica, Dec. 5, 

 1912 to Jan. 18, 1913. Mallali on the Demerara R., Mar. 20, 1913 

 (Parish) ; collection of the author. Dutch Guiana, Van der Wulp's 

 type of tenuis. Brazil, female from Ceara in Museu Rocha. Para- 

 guay, Piedro Bay. April, H. H. Smith, collector; part of the Willis- 

 ton collection in the American INIuseum of Natural History in New 

 York City. 



h 



