Cutiterebra and its Allies m the British Mtiseum. 383 



tuft of yellow pile on the pleural in front of the base of the 

 winfjs, eniirehj clothed xoith black hair: abdomen shiniiif^ 

 ])luni-purj)le *, the anterior margins of the third and t'ourtli 

 sc/i^nients narrowly yellowish j)ollino3e; in the case of the 

 third segment there is an exj)ansion of this narrow band on 

 each side, so as to include the posterior margin of the ])re- 

 ceding segment, and tliere are indications that the band at the 

 base of the fourth segment is similarly expanded at the sides; 

 the sides of the first four segments below and the whole upper 

 surface of the fiftli s])rinkled with the usual irregular 

 markings of yellowish jinllen, leaving connected or isolated 

 dots of the shining ground-colour. Legs : tarsi large and 

 broad; last two pairs of femora with a patch of yellowish 

 pollen at the base in front. Wings broader than in C. ameri- 

 cana, F., 7/. millim. in width at their broadest part, some- 

 what ])aler towards the base on the inner side. 



Prof. Brauer (' Monographic,' &c. p. 245) states that he 

 regards C. terrisona as a synonym of C. americana, F., and 

 that he cannot understand how Walker could separate it ; on 

 this account Walker's species is definitely referred to 

 C. americana by van der Wulp (Biol. Centr.-Amer., Diptera, 

 vol. ii. ]). 1). C. terrisona is, however, a perfectly good 

 species, which can at once be distinguished from C americana 

 by the pleuraj being entirely clothed with black pile, except 

 the small fleck of yellow hair, and by the absence of the 

 jagged yellow pollinose border to the cheeks in the female. 



Cutiterebra americana^ F. 



Cuterebra americana, Fabricius, Syst, Ent. 774, (i (iiec Walker, List 

 Dipt. &c. iii. p. (iSiJ). 



Two specimens, both females — one labelled " Georgia," the 

 other without a locality. In his description Fabricius 

 writes, " thoracis lateribus canis : " in these specimens the 

 pleuite are clothed with cadmium-yellow pile, but herein they 

 agree with Prof. Brauer's description of the species (' Mono- 

 graphic,' &c. pp. 243-244) and also perfectly with Bracy 

 (Jlark's coloured figure of his species C. cauterium (' An 

 Essay on the Bots of Horses and other Animals,' London, 

 1815, p. 70, pi. ii. fig. 28), which is regarded by Brauer as a 

 synonym of C. americana, F. The colour of the pile 

 clothing the pleura is probably variable. In these specimens 

 the contrast between the yellow pleura3 and black dorsum is 

 very sharp, and with the j)ulished deep purple abdomen and 

 unitormly deej) brown wings renders the species a strikingly 



* Kidpwav, ' Nomeiiclatiure of Coloursi,' pi. viii. 



