SIMULIUM. 49 



Orizaba, Mex. (F. Kiiab) ; Livingston and Alta Vera Paz, Guate- 

 mala (Schwarz and Barber). 



A translation of Bellardi's description of the male of Simulium 

 nietalUcum is as follows: 



Metallic blue-black. Base of antennae, halteres, fore femora, middle portions 

 of fore tlbiiB, bases of mid aud hiud tibisE, and bases of first and second joints 

 of mid and bind tarsi white. Wings hyaline, veins rather indistinct. Length 

 of body, 2 mm. ; wing expanse, 5 mm. 



Nothing is said as to whether the thorax is striped or not. 

 Roubaiid found a female in the Paris Museum, belonging presum- 

 ably to the original lot from which the male was described, and 

 published a description of it in 1906.^ He did not redescribe the 

 male. 



Larva. — Similar in color to those of venustum and jdnntngsi and 

 about the same size as the latter. The labium is of the same type 

 as those of this group also, but the intermediate teeth between the 

 central and outer teeth are very small; in this respect it is more 

 closely allied to venustum., though there appear to be only three 

 distinct lateral ventral seta?, as in jenningsi. 



Pupa. — The species has eight respiratory filaments, but these 

 differ in the branching from plscicidium, as shown in Plate VI, figure 

 4. The cocoon is similar to that of venustum, closely woven and 

 found on leaves and stems of plants. 



The foregoing details are drawn from material sent in by Mr. 

 F. W. Urich, from Trinidad, along with imagines of this species. 



Simulium meridionale Riley. 



Female. — Gray, or brown-black with very thick gray dusting, 

 opaque; antennae and palpi brown-black, the former but little paler 

 at base in some specimens, in others entirely dark. Scutum with 

 three narrow black or brown stripes, the outer two curved, sometimes 

 almost straight on anterior portions; pleura? gray; scutellum some- 

 times brownish or yellowish, with gray dusting. Abdomen in type 

 gray with opaque brown-black cross-bands on segments 2-5 which 

 occupy the whole disk on center but taper toward sides, segments 

 6-8 and portion of 9 visible gray-black with a bluish sheen. This 

 coloration is abnormal, in my opinion, and is very probably due to 

 the fact that the specimen was either drawn from the pupa or was 

 prematurely killed. In the great majority of specimens before me, 

 including a large number of the reared specimens of Riley's original 

 series, the abdomen is more or less distinctly banded with black or 

 brown on segments 2-4: only, and there are dorsal spots in varying 



MJul. Mus. Illst. Nat. Taris, vol. i;5, p. 510. 

 16125°— 14 4 



