114 PROF. M. BEZZI. 



15 (16). Yellow thoracic stripes less developed ; black scutellar spot margined 

 with red ; brown fore border of wings not much dilated at end ; abdomen of male 

 with a complete basal black cross-band on third and fourth segment 



sji. nov. (not named). 



16 (15). Yellow thoracic stripes very broad and striking ; black scutellar spot 

 not margined with red ; brown fore border dilated into a spot at end ; abdomen of 

 male only with a black spot on each side on the third and fourth segment 



scutellat'us, Hend. 



C. scutellinus is a previously undescribed species from the Philippines, collected 

 by Prof. C. F. Baker ; the unnamed new species is from Japan {Dr. Miyahe), but I 

 have received it also from South China, Foochow {Gardner). 



iv. Mellesis, gen. nov. 



In erecting my new genus Monacrostichus* I provisionally comprised in it, besides 

 the type species, the Oriental and Austrahan species sepedonoides, aequalis, longi- 

 cornis {vespoides) and conopsoides ; subsequently I described M. crabroniformis 

 from India.t 



At present I have before me very numerous species, which agree with Monacro- 

 stichus in having a Btalked abdomen, a reduced thoracic chaetotaxy and elongate 

 antennae ; but they are different in having no acrostrichals, an interrupted suture, 

 non-spinose front femora and the second section of the fourth longitudinal vein not 

 sinuous, I now therefore think it is better to restrict the genus Monacrostichus to its 

 type species citricola, and to erect for the other species a new genus, to which may be 

 given the name of Mellesis (from the Greek mellesis = delay), in allusion to the fact 

 that it is still to be decided which of the above-named species belong to it or not, and 

 what is to be considered its relation to the genus Callantra. Monacrostichus crabroni- 

 formis, Bezzi (1914), is to be treated as the type of the genus Mellesis. 



The new genus differs from Chaetodacus as follows :• — ^First antennal joint as long 

 as the second, the antennae being much longer than the face. No praescutellar 

 bristles ; anterior supra-alar bristles usually present, but sometimes wanting. 

 Abdomen club-shaped. Wings without the supernumerary anal lobe in the male. 



The known species are rather uniform in facies and wing pattern ; they have a 

 wasp-like appearance and seem to mimic certain Hymenoptera of the groups 

 Crabroninae or Eumenidae. The species known to me may be tabulated as follows : 



1 (4). No anterior supra-alar bristle ; abdomen less stalked, being constricted 

 only at base ; fronto-orbital bristles Avell developed ; face yellow, with a black 

 stripe in each antennal groove, which reaches below the mouth border ; h}^opleural 

 spot double ; wings rather broad, with the second basal cell rather short. 



2 (3). Frons broader than an eye, with only two pairs of lower fronto-orbital 

 bristles ; antennae much longer than the face, Avith the two basal joints elongated ; 

 wings yellowish, with a broad, rounded, apical blackish spot 



sphaeroidalis, sp. nov, 



♦Philippine Journal of Science, viii, 1913, p. 322. 

 tlhill. Entom. Res., v, 1914, p. 153. 



