18 PROCEEDIXGS OF THE KATIOIs^AL MUSEUM vol.84 



Heretofore nothing has been known of the host relations. A spec- 

 imen of naivaii from the Philippine Islands, however, was reared as 

 a parasite of Chri/sopa, and it appears reasonable to suppose that 

 Chrysopa is the normal host of the genus, since in general form of 

 head and thorax the species are similar to the species of Chryso- 

 poctonus. 



Genus BRAYCHYCYRTUS Kriechbaumer 



Brachycyrtus Kriechbai;mer, Corresp. Blatt zool.-min. Ver. Regensburg, vol. 



34, p. 161, 1880. (Genotype, Brachycjirtus ornatus Krieclibaumer.) 

 Proterocryptus Ashmead, Proc. U. S. Nat. Mus., vol. 30, p. 174, 1906. (Geno- 



tj'pe, Proterocryptus naivaii Aslimeacl.) 



KEY TO SPECIES OF BRACHYCYRTUS 



1. Malar space much reduced; occipital carina extending straight 



to base of mandible ; eponiia absent or distinct at most below ; 

 scutellum margined to apex, its fovea not limited anteriorly 

 by a sliarp carina, not foveolate; nervulus postfurcal by more 



than its length (American species) 2 



Malar space nearly or quite as long as basal width of mandible; 

 occipital carina inllexed below and joining hypostoraal carina; 

 epomia strong and complete; scutellum margined only at 

 base, its fovea limited anteriorly by a sharp carina, strongly 

 foveolate; nervulus postfurcal by less tlian its length (Old 

 World species) 4 



2. Eyes deeply emarginate opposite antennae; epomia developed 



below; scutellar fovea narrow and deep; propodeum com- 

 pletely areolated, minutely punctate and densely clothed with 

 white pubescence ; second tergite with distinct elongate gastro- 



coeli; thorax largely ferruginous (Florida) pretiosus, new species 



Eyes barely emarginate ; epomia a])sent ; scutellar fovea broad 

 and shallow ; propodeum uniformly shagreened, entirely with- 

 out pubescence, Incompletely areolated, lateral carina largely 

 absent ; second tergite without trace of gastrocoeli ; body 

 yellow with black markings 3 



3. Eyes distinctly convergent below ; face broader than long ; pro- 



podeum with all apical areas defined (Panama) — converg'ens, new species 

 Eyes nearly parallel ; face fully as long as broad ; propodeum 



without apical pleural areas (Panama) oculatus, new species 



4. Discocubitus subangulate ; abscissula nearly half as long as 



intercubitella ; abdomen black with tergites margined with 



yellow (Japan; Philippine Islands) nawaii (Ashmead) 



Discocubitus arcuate ; abscissula about one-fourth as long as 

 intercubitella ; abdomen rufous with tergites more or less 

 blackish basally and white apically (Australia) australis Roman 



The genotype, ornatus Kriechbaumer, is not included in the key 

 because none of the group characters of the first couplet is mentioned 

 in any description that I have seen. The species, however, is dis- 

 tinct from all others in its generally black body with much less 

 extensive yellow markings. 



