52(3 PHYSIS (IV, igig) 



Esta especie, la más pequeña conocida hasta la fecha, pues mide ape- 

 nas 5 milímetros de largo, es fácil de reconocer por su cabeza del mismo 

 largo que el pronoto, la sinuosidad profunda de los bordes laterales de 

 este último, y su forma alargada con ensanchamiento abdominal muy 

 agudo al nivel del \" segmento. 



Tengo un solo ejemplar que me fué enviado por el Dr. E. Giacomelli, 

 de La Rioja. 



Es muy vecina de la especie anterior, de la cual quizá no sea más que 

 una variedad, pero hasta que se encuentren las formas intermedias no me 

 es posible incluirla en ella. 



MILES STUART PENNINGTON, Descripción de un nuevo liemíptero. 



Leptobyrsa mendocina n. sp. 



Moderately broad ; testaceous or ferruginous, the head & the body ben- 

 eath in great part blackish, pronotum reddish brown rather dark, mar- 

 gins of pronotum & elytra palé testaceo-hyaline, the nervures fuscous on 

 the subcostal & part of the discal área ; legs palé testaceous, pilóse, tarsi 

 fuscous. Antennae testaceous sparsely pilóse, /j^'' joint fuscous. HeadAvith 

 o long frontal spines; antennae moderately slender, i^' joint about as long 

 as the fourth, second very short, 3"^ longest three '/o to four times as long 

 as first. Rostrum short barely reaching middle of mesosternum. Prono- 

 tum with the membranous margins strongly and acutely produced ante- 

 riorly, but not as far as the apex of the pronotal hood which extends 

 slightly beyond the apex of the head; the three carinae more or less the 

 same hight, uniseriate, the pronotum betAA^^een the carinae covered Avith 

 íine sparse Avhitish hairs. 



The elytra about twice as long as abdomen, rounded at apex & more 

 broadly so at base, discoidal área tumid, proportionately much larger 

 than in L. steinii. Stal, costal área biseriate to about the middle, these 

 areolae rather large and replaced at the extreme base bv two rows of 3 

 smaller cells. 



The borders of the expanded margins of the pronotum and the costa 

 of the elytra slightly pilóse, the nervures forming the areolae of the elytra 

 bear numerous setae or spinulae. 



Length. incl. elytra 4-4>5 mm. Breadth. 2-2,5 mm. 



This species is easily separated from L. cacullata Berg, by its much 

 greater size and from both it and L. passiflorae Berg by its median pro- 

 notal carina with only one row of cells. It is most closely allied toL. stei- 



