ART. 6. STUDIES ON LEUCOSPIDINAE C. J. WELD. 15 



Type. — Cat. No. 1798 in the Academy of Natural Sciences, Phila- 

 delphia, where it has been seen by the writer. 



5. LEUCOSPIS TOLTECA Cresson. 



Described from four females and one male collected in Mexico by 

 Professor Sumichrast. 



Type. — Cat. No. 1801 in the Academy of Natural Sciences, Phila- 

 delphia, where they have been seen by the writer. 



6. LEUCOSPIS ROBERTSONI Crawford. 



LexLCOspis robertsoni Crawford Proc. Ent. Soc. AVash., vol. 11, 1909, pp. 51-52. 



Described from one female and two males from Southern Florida. 

 Diagram of scutellum, metanotum and propodeum shown in text, 

 figure 2 c and d. 



Type.— Cat. No. 12581, U.S.N.M. 



7. LEUCOSPIS CAYENNENSIS Westwood. 



This species is represented in the United States National Museum 

 by nine females collected from the following localities : Brazil, San- 

 tarem; Panama, Corazal, Canal Zone (June 11, Busck), Porto Bello 

 (Mar. 19, 1911, Busck), Tabernilla, Canal Zone (July 23, 1907, 

 Busck); Guatemala, Livingston (Barber and Schwarz), Cayuga 

 (February, Schaus and Barnes), (Oct. 15, Schaus) ; Honduras 

 (Mann). The Academy of Natural Sciences, Philadelphia, has a 

 female from Costa Rica (June 21, 1903, Crawford), which the writer 

 has determined as this species. 



Diagram of pronotum shown in text, figure 1(a) ; abdomen on 

 plate 3, figure 17 ; hind coxa on plate 4, figure 24. 



8. LEUCOSPIS OPALESCENS, new species. 



In Schletterer's key this species runs nearest to caycnnensis West- 

 wood, because of its long ovipositor and the absence of transverse 

 carinae on the pronotum, but the two are so different in general 

 appearance that they could not be confused. It also resembles rohert- 

 soni Crawford, from which it differs in having a low median keel on 

 the propodeum and a spur on the upper margin of hind coxa. In 

 Roman's key to South American species it runs to egaia Walker, but 

 has a wider propodeum, a different shaped metanotum, and a more 

 rotund hind femur. In structure it is most closely related to formiosi- 

 facies Strand, an Argentine species. There are, however, such dis- 

 tinct differences in coloration that a separation seems advisable. 



Female. — Length 10.8 mm. A reddish irridescent species nchly 

 marked loith yellow; ovipositor longer than abdonnen; hind coxa 

 tvith prominent spur on upper inargin. 

 20107— 22— Proc. N. M. vol. Gl 5 



