370 Annals of the Carnegie Museum, 



of an exception) ; costa broken through twice, immediately beyond the 

 humeral cros?-vein and before the apex of the first vein ; alula developed ; 

 discal and second basal cells united, yet the place of the missing, 

 separating cross-vein is indicated by some color or transparency, but 

 it is not a cross-vein as in Phortica and Stegana. Face not nasute. 

 Oral vibrissse present; three strong fronto-orhital bristles, the lowermost 

 proclinate, the two upper ones reclinate; the lower reclinate bristle is 

 situated near the proclinate and slightly closer to the eye; the upper 

 reclinate is removed towards the vertex or about midway between the 

 lower reclinate and the inner vertical bristles and not below the level 

 of the lower ocellus (except in L. gondi sp. not., where the upper rec- 

 linate is distinctly nearer to the lower reclinate than to the inner 

 vertical and seemingly slightly below the level of the lower ocellus) ; 

 two diverging verticals (that is two pairs of verticals, the inner pair 

 converging, the outer pair diverging); two postverticals, exceedingly 

 minute, haiflike, strongly convergent (slightly so in L. argenteo- 

 fasciata sp. nov.) or decussate at tips (in L. ambigua sp. nov. the post- 

 verticals are strongly developed); one pair of strong, proclinate, and 

 divergent ocellars; two posterior dorso-centrals, the hindmost one of 

 which is the strongest; one pair of well-developed prescutellars, much 

 weaker and shorter, however, than the posterior dor^so-central; one 

 humeral (except in L. ambigua sp. nov.); two strong notopleurals; 

 one presutural, usually small; two supra-alars, the posterior strong, 

 the anterior small, situated closely behind the transverse suture and 

 apparently lower down; two postalars, the anterior strong, of the size 

 of the posterior supra-alar and situated at the top of the transverse 

 ridge which divides the supra-alar cavity, the posterior postalar very 

 minute (except in L. ambigua sp. nov.), situated exterior to, but near 

 the anterior end of the scutellar bridge; two diverging sterno-pleurals, 

 the anterior weaker and situated at the sterno-pleural suture, the 

 posterior situated a little lower down; four marginal scutellar bristles; 

 otherwise the scutellum is bare. Mesonotum covered with minute 

 setulai in indistinct rows. Sterno-pleura with small hairs placed 

 somewhat in a row from the anterior sterno-pleural bristle downwards 

 (in L. ambigua sp. nov. some besides are irregularly scattered) ; other- 

 wise the metathoracic and pleural regions are bare. Abdomen covered 

 with small setula;, and a row of longer setulaj before the apical margin 

 of each segment. Front in the middle with minute hairs, apparently 

 in two rows extending from the antennae towards the ocelli, and a row 



