THE ENTOMOLOGIST 



Vol. XXXL] MAY, 189 8. [No. 420. 



NOTES ON AQUATIC EHYNCHOTA.— No. 2. 

 By G. W. Kirkaldy. 



1. Brachymetra bakeri, Kirk., n. sp. 



Apterous form. — First antennal segment four times as long as the 

 second. Second rostral segment extending beyond the apex of the 

 mesosternum ; third segment very short. Anterior femora cylindrical, 

 incrassate, shorter than the whole length of the insect (from head to 

 apex of abdomen), one-fourteenth longer than the tibiae, which are 

 five-sixths longer than the tarsi, first tarsal segment one-fourth longer 

 than the second. Intermediate and posterior femora subequal ; inter- 

 mediate femora two-thirds longer than the tibiae, which are about Jive 

 times as long as the tarsi. Abdominal segments simple. Long. 13 

 mm. ? . Colombia (C. F. Baker) ; my collection. 



Head, first antennal segment, first and second rostral seg- 

 ments, pronotum, anterior femora, intermediate and posterior 

 legs rufo-castaneous ; anterior tibiae and tarsi nigro-castaneous. 

 Second antennal segment, metanotum and dorsum of abdomen 

 blackish ; third and apex of second rostral segments pitch-black 

 (all these parts are more or less covered with short, rather 

 coarse hair). Prosternum pale castaneous ; mesonotum, meso- 

 sternum, and venter of abdomen with short, dense pubescence, 

 silvery-white on the mesonotum, lilac-grey on the mesosternum, 

 and slightly redder in tint on the venter of abdomen. 



I am indebted to Prof. Carl F. Baker for sending me this 

 species, and permitting me to retain the unique specimen for my 

 own collection. It may be readily separated from B. albinervus 

 (Am. Serv.) by the following characters : — 



Length 6-7i mm., first antennal segment twice as long as second ; 

 anterior femora incrassate, compressed, laterally dilated, one-sixth 

 longer than tibiae, which are two and a quarter times as long as tarsi ; 

 ventral surface covered with pale yellowish pubescence. (Brazil, 

 Grenada, St. Vincent, &c.) - - 1. albinervus (Am. Serv.). 



BNTOM. MAY, 1898. L 



