PKOCTACANTHUS.— ECCEITOSIA. 207 



Eacial tubercle but little prominent ; mystax white, with a very slight yellowish 

 tinge ; palpi with white hairs at the tip ; face white pollinose ; beard pure white ; a 

 tuft of white hairs on each side of the front ; hairs on the vertex and the upper part of the 

 occiput yellowish. Antennae black, the second joint reddish ; first joint beset with white 

 pile. Thorax with a brown dorso-central double stripe, its median line pale brownish- 

 yellow ; the lateral stripes of a paler brownish ; the interval between the dorso-central 

 and lateral stripes greyish ; all the hairs and macrochaetae on the thorax and scutellum 

 pale yellowish-white ; pleurae yellowish-grey pollinose. Abdomen yellowish-grey ; in 

 the male each of the segments up to the sixth with an elongate, narrow, dark brown 

 spot in the middle (that on the sixth only indicated by a brown line), the series of these 

 spots along the back forming a longitudinal stripe slightly interrupted at the incisures ; 

 in the female the dorsal stripe reaches, without any diminution, to the end of the seventh 

 segment. Ventral surface greyish-yellow pollinose, with a vestige of a brownish longi- 

 tudinal line in the middle. Male forceps small ; upper valves short, beset with whitish 

 hairs. In the female the eighth abdominal segment is reddish-brown, horny, cylindrical, 

 a little longer than the preceding segment, and slightly attenuate at the end ; and the 

 coronet of spinules at the end of the ninth segment is very small. Halteres reddish- 

 yellow. Legs densely clothed with whitish hairs, the bristles mostly whitish ; ground- 

 colour of the front pair reddish, the front side of the femora (except the tip) and the tip 

 of the tibiae black ; the middle pair of the same colour, but with the black on the front 

 side of the femora more extensive, and reaching the tip, and the tibiae not only dark at 

 the tip but also with a blackish line from thence to the basis ; the prevailing colour of 

 the hind pair black, but with a reddish stripe on the hind side of the femora and of the 

 tibiae. Wings subhyaline ; venation normal ; tip of the posterior branch of the third 

 vein slightly turned backwards. — One male and one female. 



N.B. — The structure and small size of the male forceps, and the comparatively small 

 coronet of spines at the tip of the ovipositor, distinguish this species from the normal 

 Proctacanthus ; nevertheless there is no ground for a generic separation. 



Two species of this genus have already been described from Central America : — 



Proctacanthus craverii, Bellardi, Saggio &c. ii. p. 50. — Mexico. 



rufiventris, Macq. Dipt. Exot. i. 2, p. 123, t. 10. f. 2. — Honduras. 



ECCEITOSIA. 



Eccritosia, Schiner, Verh. zool.-bot. Ges. Wien, 1866, p. 674. 



1. Eccritosia amphinome. 



Asilus amphinome, Walker, List &c. ii. p. 387 (<? ? )\ 



Hob. Mexico, Presidio (Forrer) ; Guatemala, Rio Naranjo 450 feet (Champion) ; 



HONDUEAS *. 



