1940] The Genus Echestypus 93 
the Rain Forest of the Congo Basin, as well as West Africa 
proper. 
Synonymy. — The types of E. paradoxus are at the Liver- 
pool School of Tropical Medicine. Although I have not seen 
them, there can be no doubt that the species here called 
paradoxus is the one described and figured by Newstead and 
later figured by Ferris (1930) under the same name. 
Speiser evidently could not have been acquainted with 
Newstead’s paradoxus , when he erected his genus Eches- 
typus. There seems to be no reason why the three species 
he knew should not be the same as those recognized in the 
present paper. Both his E. sepiaceus and E. binoculus may, 
I believe, be recognized with certainty from the descriptions, 
as shown in the sequel. Hence, a priori, Speiser’s third 
species, E. parvipalpis, may be Newstead’s paradoxus, par- 
ticularly in view of the fact that this is the most common 
and most widely distributed of the three. The types of 
E. parvipalpis are at the Stockholm Museum and I have 
not seen them. The statement about the unusually short 
palpi clearly applies only to E. paradoxus and the remainder 
of the description also fits this species better than either 
of the others. 
The descriptions of E. paradoxus and E. parvipalpis were 
published the same year, but that of paradoxus certainly 
appeared first. The issue of the Ann. Trop. Med. Paras., 
containing the description, was dated February 1st. The 
paper on the Diptera Pupipara of the Kilimanjaro Expedi- 
tion, by Speiser, was first recorded at the meeting of April 
10, 1907, of the Stockholm Academy of Sciences (Kungl. 
Svenska Vetenskapsakad. Arsbok for 1908, p. 33). 
Characters. — In addition to the features mentioned in 
the key, E. paradoxus is characterized by the slightly more 
developed chetotaxy ; there is usually one more dorsocentral 
and the disk of the basal tergal plate bears a number of 
setae, mostly in one oblique row. The second to fourth tergal 
sclerotized plates of the abdomen are rather smaller in the 
female than in the other species, although their anterior 
limits are poorly defined ; moreover, in the male there are 
only four sclerotized tergal plates (II to V) behind the 
basal plate (I). The hind margin of the crescent-shaped 
basal sternite of the abdomen forms a shallow, semi-elliptical 
