17() INSECUTOR INSCITI^ MENSTRUUS 



The genitalia come near to those of albinensis, but they have 

 an extra chitinous point at the apex of the second uncal plate. 



We have only one male, found in Surinam, but we lost the 

 note of the exact locality. 



Culex (Melanoconion) ensiformis, new species. 



Proboscis slender. Palpi short in the female, long in the 

 male. Occiput brown, with creamy white curved scales in the 

 middle, grayish fiat scales at the sides and with numerous 

 black erect scales. Mesonotum with creamy golden, narrow 

 curved scales, but a broad median and two lateral stripes of 

 brown narrow curved scales. Scutellum brown with some 

 creamy golden scales. Abdomen black above with basal seg- 

 mental lateral white patches ; center black, with narrow pale 

 basal bands. Wings hyaline with ovate scales near the tip. 

 Legs black, tips of femora, tibiae and bases of first tarsal joints 

 paler. Length : Body, 3 mm. ; wing, 2.5 mm. 



Genitalia : Side-piece with a lobe at outer third and simple 

 clasp-filament. Outer division of the lobe small with a ribbed 

 leaf and a seta, inner division with a rod and a seta. Harpes 

 with comb-shaped tip. Plate at the base of the side-piece 

 narrow, blade-like< 



Larva : Antennae large, a tuft beyond the middle, spinulate. 

 Upper head-hairs multiple, lower single. Body pilose. Lat- 

 eral comb of the eighth segment of many small spines and one 

 row of very long spines in a patch. Air-tube long and slender 

 with five pairs of tufts and a pecten of about eleven spines on 

 basal third. 



We found the larvae in grassy pools, Kabelstation, Decem- 

 ber, 1918; Dam, January, 1919. 



This species is very characteristic in the larva, because of 

 the long air-tube and the large spines in the comb of the 

 eighth segment. 



Cotype, No. 22709, U. S. National Museum. 



Culex (Melanoconion) commevynensis, new species. 



Male. Proboscis moderate, expanded apically. Palpi long. 

 Occiput with pale golden, narrow curved scales, yellowish and 



