A434 Timehri. 
species known to me is the Central American L. godmanz, Cam., which may be 
known from it by the rufus mandibles, labrum and 4 front tarsi, by the 1st 
transverse cubital nervure being roundly curved, not straight, by the 2nd 
transverse cubital nervure being - received beyond the middle, by there being 
no keel down the base of the metanotum and by its apex not being trans- 
versely striated, and the furrow there is wider, shallower and less clearly 
defined. L. americana, Saus., 1s an allied species, it has the wings pale at the 
base, the leg spines rufo-fuscous. L. brawnsii Kohl. is ancther allied species. 
An easy machine of separating ZL. ywana from L. godmuani is that in the former 
the eyes wbove are separated by the length of the 2nd and 3rd antennal joints 
united, in the latter by the length of the 3rd only. The abdomen in both 
quiana and godmani is very smooth and shining, and in the examples examined 
there is no pile, but there are a few pale, short hairs on the end segment. In 
yuiana the distance separating the eyes above is greater than it is in braunsid. 
The furrow bordering the pygidium is aeeper, wider, more irregular—the 
border on the inner side being more waved—and it is farther removed from 
the base of the segment than it is in yodmani. 
Tachysphex longiventris, sp. 0. 
Black, covered with a pale golden pile, the apex of the mesopleure, the meta- 
thorax entirely and the legs red; wings fuscous violaceous, paler along the 
apical margin, paler along the hinder part than in front, the stigma and nervures 
black ; the basal abscissa of the radius is twice the length of the 2nd, which is 
one-quarter shorter than the 3rd ; the 2nd recurrent nervure is received near 
the apex of the basal fourth ; the wings appear short, not reaching much beyond 
the 3rd abdominal segment ; the abdomen is longer than usual, the basal 3 
segments united are not much longer than the thorax. Female. 
Length 15 m.m. 
There is a distinct shining, narrow keel down the middle of the clypeus ; its 
_apex is shining, obliquely depressed in the centre. Thorax granular ; the apical 
slope densely covered with golden pile; a distinct furrow down its centre ; 
the golden pile extends on to the pleure. There is a patch of golden pile above 
the mesopleural loiigitudinal furrow. Abdomen opaque, pruinose, 
Tachysphex senrappendiculata, sp. n. 
Black, densely covered with silvery pubescence, the apices of the abdominal 
segments with a distinet border of silvery pile ; the pygidium with a flat, smooth 
shining border, the central part opaque, closely, irregularly striated, the striae 
stronger towards the apex, which ends in 5 longish, stout spines; wings 
hyaline, the stigma and nervures black ; the recurrent nervures are received 
near the apex of the basal third ; they unite and are almost appendiculated ; 
the lst abscissa of the radius is almost as long as the 2nd and 3rd united, the 
2nd hardly one-fourth longer than the 3rd. There is a small, rounded incision 
in the apex of the clypeus. Mandibles dull red. The eyes at the top are 
separated by the length of the 8rd antennal joint. The ocellus is longer than 
wide and ends in a stout keel, narrowed below ; the raised part below it is 
