
374 THE AMERICAN NATURALIST.  [Vor. XXXVI. 
two median larger and less approximate ones; and a pair of subapical 
ones. Scutellum very small, with a pair of dorsal macrochete. Thorax, 
seen from the side, but little larger than the head, strongly elevated in front; 
coxz of the usual form. 
Legs rather slender, espe- 
cially the tarsi. Spurs of 
four front tibize well devel- 
oped. Wings about as long 
as the width of the thorax, 
arcuate, of nearly equal 
bristles on its basal external 
margin. Atabout the mid- 
dle these suddenly enlarge 
to form enormous macro- 
chetz, which continue to 
enlarge until at the tip they 
are more than twice as long 
as the wing and exceedingly 
stout. There are about ten 
of these large macrochete, 
which are all strongly, 
thickly; and almost scaly pubescent. Abdomen shaped as in Commoptera, 
without any indications of segments or sclerites, except the one probably 
corresponding to the fourth dorsal plate of Ecitomyia, which is small, with 
- macrochætæ, and has a chitinous ring extending from its posterior edge, 
which no doubt serves in connection with a gland like that of Ecitomyia. 
Abdomen everywhere sparsely and regularly finely bristly. 


Fic. 4. — A contistopt landeri Q sp. nov 
11. Acontistoptera melanderi sp. nov. 
"Length 1 mm.; of longest wing bristle, .4 mm. Light yellow, head 
darker, fuscous in places, the occiput irregularly lighter, a small yellow 
circular spot at the base of all the macrochzta. Antenne and palpi and 
lower part of the head yeliosióh white. Thorax above but little lighter 
than head. Wings almost white, their bristles black and very conspicuous. 
. Abdomen, underside of thorax, and legs pale yellow. Legs finely black 
hairy and more deeply colored distally. 
Described from a single female specimen ! collected in a nest 
of Eciton opacithorax Em., March 24, 1901, at Austin, Texas. 
! After this article had gone to press di bars) fortius ast find ten more 
eee: d Maher nest of the same ant on December 6 and 7; ep 
AER. 

E 

