no. 3644 TIPHIIDAE — KROMBEIN 19 



Pronotal disk margined anteriorly by a weak ridge, the anterior 

 half with punctures arranged contiguously in irregular transverse 

 rows; scutum and scutellum with coarse, shallow, contiguous pits; 

 mesopleural disk with very large, shallow, contiguous pits; meta- 

 pleuron with only faint traces of ridges above; dorsal surface of 

 propodeum with a narrow median channel crossed by a few, very 

 weak rugae, laterad of this with coarse pits, the posterior margin 

 with a strong transverse ridge anterior to which are some elongate 

 pits; lateral surface with a few strong rugae, posteriorly with close, 

 contiguous pits; posterior surface with smaller, shallow, contiguous 

 pits. 



First tergum with a strong transverse ridge anteriorly, behind 

 which is a series of large, confluent punctures; none of sterna with 

 patches of fine dense hair. 



Genitalia not examined. 



Female. — Unknown. 



Hylomesa dimidiaticornis (Bingham), new combination 



Figure 2; Plate 1 (fig. 5) 



Myzint dimidiaticornis Bingham, 1896, p. 423; 1897, p. 68, fig. 11. — Turner, 



1908a, p. 501; 1908b, p. 131; 1909, p. 480. 

 Plesia tricolor (Smith). — Margretti, 1892, in part, pp. 258-259. 

 Elis (Mesa) dimidiaticornis (Bingham). — Turner, 1912, pp. 720-721, pi. 81 



(fig. 15); 1914, p. 247. 



This species, known only from the male, is recognized easily be- 

 cause of the patches of velvety vestiture at the apices of the fifth 

 and sixth sterna and because of the three transverse ridges on the 

 pronotal disk anteriorly. There is some variation in color, the type 

 from Kumaon, North India, having the head black except for ferru- 

 ginous on the clypeus and parts of the front and antenna, whereas 

 males from Mysore and Burma have the head almost entirely red. 



Male (redescription of type). — Length 13, forewing 10 mm. Head, 

 thorax, and abdomen black, the latter with faint bluish reflections 

 on terga; the following dull red: palpi, mandible, clypeus, small area 

 laterad of antennal insertions, the frontal platform immediately above 

 antennae, scape, pedicel, first four flagellar segments, and fifth seg- 

 ment beneath; wings clear on basal half to cross veins, forewing 

 infumated on apical half with weak violaceous reflections, hind wing 

 infumated on apical third. 



Clypeus with apical margin slightly thickened and with two small, 

 close teeth in middle, the median keel weak, present on basal two- 

 thirds; distance from apex of frontal platform to occiput 0.91 times 

 the head width across eyes; front with coarse contiguous punctures, 

 confluent in irregular vertical rows, median furrow lacking; ocelloc- 



