PI II, 015 ACT HUM. 137 



running obliquely from the base of antennae to the jowls, but not 

 reaching the inferior corners of the eyes ; these furrows seem to 

 be adapted for the reception of the thiixl antenna! joints. Ocelli 

 near together, but not in contact ; opening of buccal cavity small, 

 proboscis thin, somewhat projecting. Antennae very peculiar; first 

 joint shining black, comparatively short, almost bare ; second very 

 short, but distinct ; third pendulous, extremely elongate, five times 

 as long as the first, dark grey, clothed throughout its whole length 

 with long, thin, soft hairs, which are arranged like feathers on the 

 inner and outer sides ; the base of the third joint is excavated on 

 the outside, and at this point there is to be observed a very short 

 rudiment of the arista ; the extreme tip of the third segment is 



Fig. 26. PtHobactrum iifurei. ^p. n. 

 Left antenna from outer side, X 12. 



bare, and ends obliquely. Pubescence on head, thorax, and scu- 

 tellum rather long, but not dense. Scutellum simple, rounded. 

 Abdomen conical, a little broader than the thorax at base, the 

 second segment simple, the third a little longer than the second, 

 the fourth twice as long as the third. Legs short and stout, 

 almost bare. Wings with usual venation, the subapical cross-vein 

 strongly recurrent, the lower outer angles of the subapical and 

 dorsal cells acute and not provided with appendices, the stump on 

 the third vein of moderate length, the small cross-vein situate on 

 the basal third of the discal cell. 



Type : P. neavei, sp. n. 



In the North-American species, M. packystylum, Will., referred 

 to above, the arista is also very short about a third of the length 

 of the last antennal joint, which is, however, quite bare. 



141. Ptilobactrum neavei, sp. n. 



Length of body 13 mm. ; length of the third antennal joint 

 alone 4- 5 mm. 



A black species, with the second and third abdominal segments 

 yellow, the third having on each side a broad round black spot. 



Head black, punctate, moderately shining ; frons near the eyes, 

 and jowls partly of a dark yellowish colour ; the dark yellowish 

 hair along the vertex is very long and erect, while on the middle 

 of the frons at the sides the hair is short ; pubescence on face pale 



