86 UKl'OUT ON KCONOMIC KNTOMOLOOY 



TrypuiiosDniiiisis Kx|)c<liti()n to tlio Coii^'o, I'.td.i-I'tit I. .Mciiioir XIII.. i,ivi iinuil Sdiool of 

 TiDpiiai .Mtiliiiiic. I'.tli4). 



Tlif iiliuvf - iLiciitioiici! geiitli'iiK'ii showed that tlie niugjiots occur in numbers in tiic 

 native liuts in tlie Congo region. At niglit tliey crawl out uf the crevices of tin- muii floors 

 am! from umlcr the sleeping inat.-s, ami suck tlic liioud of mu'M, women ami cliiiiln-ii, ami then 

 J ntuni tu tlieir siielters. 



Tiu- nuiggots are normally dirty white, but after a meal of blood they become red in 

 colour. 



The following is the original description : " Tlie larva is broadest at the ninth and tenth 

 segments, is roughly ovoid in transverse section, and has, distinctly, dorsal and ventral 

 surfaces. At the junction of the two surfaces is a row of irregular protuberances, two or 

 more being placed on each segment. On each protuberance is a small posteriorly directed 



I 



FlC. 42. .\l'ClfMKKOMYIA LUTIioLA, Fabr. ? 



Nigeria to Natal. 



Body antl legs ycllowbh buflT ; bruad dark band across abdomen bluibh-black. 



By kind p^rmiision o/'* Htit. M^d. Ji'tirn," 



Spine ami a small pit. The central part of the ventral point is Hattuueil, and at the posterior 

 margin of each segment is a set of three foot-pads transversely arranged, each covered with 

 small spines directed backwards. These aiil tlie larva in its iiioviiiients, which are fairlv 

 rapiil and peculiar in that the iiimitli parts are protruded to the utmost aii<l the teiitacula 

 fi.\ed, as a purcha.se, first on one sitle and then on the other, while a wave of contraction runs 

 along the body as each segment is contracted and brought forward. The last segment is 

 larger than the others. Its upper surface is flattened, and looks backwards and upwards at 

 an angle of about 45 degrees with the longitudinal a.xis of the larva. This surface is 

 roughly hexagonal and bears anteriorly, one on eitlier side, the posterior spiracles, which are 

 seen with a pocket magnifying glass as three transverse, parallel, hruwn lines. 



" Around the flattened surface towards its border are placed groups of ratlier pniniimnt 

 spines. The ventral surface of this segment is also flattened, and is thrown into folds by 

 muscular contractions. The anus is situated in the anterior portion of this segment in the 

 midille line, and is seen as a longitudinal slit surrounded by a low ridge. 



" Posterior to it, and on either side, is a large conspicuous spine. The anterior segment 

 is roughly conical, and bears the mouth parts in front. Posteriorly, on the dorsal surface, are 



