PTILOBACTRUM. 137 
running obliquely from the base of antennz to the jowls, but not 
reaching the inferior corners of the eyes; these furrows seem to 
be adapted for the reception of the third iibcotiad joints. Ocelli 
near together, but not in contact; opening of buccal cavity small, 
proboscis thin, somewhat projecting. Antenne very pecuhar ; first 
joint shining black, comparatively short, almost bare ; second very 
short, but cone third pendulous, extremely elongate, five times 
as long as the first, dark grey, clothed throughout its whole length 
with long, thin, soft fas , which are arr. anced like feathers on the 
mner ail 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.—Ptilobactrinm neavet, sp. n. 
Left antenna from outer side, x 12. 
bare, and ends obliquely. Pubescence on head, thorax, and seu- 
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 w ith 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, JZ. pachys/ylum, 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 
