1921] Bowditch — Notes on South American Lacticas 47 



NOTES ON THE SOUTH AMERICAN LACTICAS. 



By F. C. Bowditch, 



Boston, Mass. 



In Psyche, volume xx page 137, is given a list of the Lacticas 

 of the Stanford Expedition to Brazil. One of the chief character- 

 istics of the genus as originally laid out, is the transverse groove 

 of the thorax, abruptly terminated by a longitudinal cut; soon, 

 however, forms turned up where this transverse groove was much 

 modified, then were added forms like tlioracica Jac. where it was 

 almost wanting, and the longitudinal cut only indicated ; then 

 calcarata 111. has a well developed spur on the hind tibia ( $ only), 

 then a species appeared with anterior ol)lique depressions on the 

 thorax (impressicollis Jac), so that the genus as originally planned 

 has been a good deal modified. Among the species undetermined 

 in the above list are : 



ruhricata Illig., 1 pair. Para. 



dehilis Har., 1 Madeira Mamore, No. 2219 Thaxter. 



trapezophorus Schf., 1 Porto Velho Eio Madeira, No. 2239 

 Thaxter. 



This last species has two foveac on the front and seems rare in 

 collections — though it may 1)e that what seems a fovea is merely 

 the rear of the not uncommon ocular sulcus, covered somewhat by 

 the witlidrawal of the head into the thorax. 



Lactica brunneipennis sp. nov. 



Oblong, medium sized, head, legs and antennne black; thorax, 

 body below and elytra bright shining reddish-yellow, the latter 

 on either side, with a wide l)lack longitudinal median stripe, start- 

 ing from the base and extending nearly to the apex, the dark color 

 especially on the disk, being beautifully shaded into the red ground 

 color. 



1 ( 5 ) Eio Madeira, Brazil, Mann and Baker, length 4 mm. 



Head impunctate on the vertex, and coarsely punctate in the 

 deep ocular sulcus at the rear of the eye, antennae reaching a little 

 beyond the middle of the elytra, the basal two or three joints more 

 or less red, second joint short, half the length of the third, that 



