74 INSECUTOR INSCITI/E MENSTRUUS 



men. Moreover, the few bristles on the lobes in our form can hardly 

 be the same as the dense vestiture of hairs Lutz mentions for these parts ; 

 his species, with 3.5 mm. length in the male, is longer than mine; the 

 ocellate spots of the mesothorax au-e not at all referred to by Lutz, no 

 more than the peculiarities of the first abdominal tergite. Nevertheless, 

 only a comparison with the types of Lutz could remove every doubt 

 about the distinctness of my species. 



TTie species is described from males and females caught by myself in 

 November, 1 9 1 3, at Porto Bello, Panama, at an old cistern. The types 

 are in the collection of the Institut fiir Schiffs- und Tropenkrankheiten at 

 Hamburg, some cotypes in the collection of the U. S. National Museum, 

 Washington, D. C. 



AN UNDESCRIBED LARVA. CULEX CHALCOCORYSTES MARTINI? 



From the water of the same cistern, in the round opening of which I 

 found the last described new species of Culex, I secured a great number 

 of Bancroftia larvae from which I partly reared the adults during my trip 

 to New York on the S. S. Karl Schurz. The rest were preserved in 

 alcohol. Among younger and older larvae of Bancroftia and some pupae 

 I found a larva of a Culex which does not run out well with the (mss.) 

 table of Howard, Dyar, and Knab, and which I therefore believe to be 

 a hitherto undescribed one and probably that of the new Culex chalco- 

 corystes. The larva is a rather small animal with a very broad head 

 and long air tube. I took the following measurements : 



Length (except the air tube and the gills) 4.5 mm., of which the head 

 0.9 mm., the thorax 0.6 mm., the abdomen 3 mm. ; air tube, length 

 2.5 mm., width at base 0.2 mm., at tip 0.1 mm., length of pecten 0.4 

 mm. = one-sixth of the air tube, hairs of the last segment about 2.5 mm., 

 brush 0.6 mm., longer gills 0.3 mm., longest hair of thorax about 2 mm., 

 length of antennae 0.6 mm. 



Head broad ; antennae 0.6 mm. long, entirely dark, with a big hair tuft 

 at about two-sevenths from the tip, the part beyond slender, bearing at the 

 tip one double and one single bristle and one spine, the longer bristles being 

 about as long as the antenna ; basal part of the latter with sparse black 

 spines. Near base of antennae a tuft of about nine hairs, dorsally a tuft 

 of three stout hairs, outside and before a single very long ciliate hair, in- 

 side a very small one ; near the inner border of the eyes originates a tuft 

 of two very fine long hairs, before the eye a tuft of three fine hairs. The 



