276 Mr. P. Cameron on 
middle. Postscutellum rounded. Median segment obliquely 
depressed from the top to the postscutellum ; there are three 
central aree—a large central and one on either side of it at 
the top, these being somewhat rounded on the outer side ; the 
spiracular area is defined and extends to the apex. Abdomen 
with seven segments, the basal five longitudinally striated ; 
the apical segments smooth; the segments project at the 
apices on the sides beneath ; the ventral fold is on the second 
and third segments. 
In Kriechbaumer’s classification of the “ Joppinen”’ this 
genus is referable to the Holojoppines and comes nearest to 
the American Microjoppa, which differs from it in the areolet 
being four-sided, the nervures being united at the top, in the 
scutellum not being quite flat and not incised at the apex, and 
in the ventral fold being distinct. ‘The antenne in my genus 
are shorter, the head is not so much depressed between the 
eyes, the abdomen is longer compared with the thorax, and the 
areolet is not so oblique; the legs are stout. Characteristic 
is the strongly longitudinally striated back of the abdomen. 
Gathetus melanocerus, sp. n. 
Luteus ; flagello antennarum abdominisque apice nigris ; alis flayo- 
hyalinis, apice violaceo. o¢ et 9. 
Long. 16-17 mm. 
Antenne black, the scape rufous beneath, the apex fuscous ; 
the scape closely punctured, thickly covered with short fuscous 
hair. Head luteous, the face paler, the inner orbits slightly 
yellowish ; the face closely punctured, the clypeus punctured 
in the middle, its sides almost smooth; the inner orbits 
distinctly and sharply margined ; the base of the mandibies 
yellowish, the teeth black. Thorax luteous; the middle of the 
mesonotum slightly darker; the pleure with a faint yellowish 
tinge on the lower side. Mesonotum closely punctured, 
thickly covered with short fuscous hair. Scutellum shining, 
slightly narrowed towards the apex, flat, covered with large 
moderately deep punctures ; the postscutellum very smooth 
and shining, the space on either side of it strongly longitu- 
dinally striated. he base of the median segment in the 
middle slightly raised above the top of the postscutellum ; the 
whole segment at the base separated from the mesonotuin by 
a deep wide transverse depression. ‘The base of the median 
seginent in the middle smooth, impunctate, this smooth space 
being continued shortly down the middle on either side of 
the central depression; the rest of the segment coarsely, 
transversely, irregularly striolated ; the ares are not clearly 
