44 HTMENOPTEKA. 



1. Ptilia versicolor. (Tab. I. figg. 9, Didymia versicolor ; 9 a-c, trophi ; 9 d, 

 saw; 9 0, antenna; 9f, head.) 



Hylotoma versicolor, K.hig, Jahrb. d. Insect, i. p. 346. no. 83 (1834). 

 Didymia versicolor, Norton, Trans. Amer. Ent. Soc. i. p. 60 \ 

 Ptilia basipunctata, Kirby, List of Hym. i. p. 46. no. 12, t. 3. f . 11 2 . 



Hab. Mexico \ Vera Cruz 2 ; Guatemala, El Reposo 800 feet, Cahabon (Champion) ; 



HONDUKAS. 



The base of the wings in one or two specimens is quite black, the usual hyaline 

 spot being entirely obliterated. 



2. Ptilia concinna. 



Hylotoma concinna, Klug, Jahrb. d. Insect, i p. 246. no. 82, t. 2. f. 8 (1834) \ 

 Hah Mexico K 



3. Ptilia nasuta. (Tab. III. figg. 1, $; la-b, tarsus; lc, spurs: Tab. IV. 



figg. 2, maxilla ; *2 a, saw.) 



Nigra, nitida, genibus tibiisque anticis sordide testaceis, pronoto mesonotoque rufis ; alis fumatis, fascia media 



apiceque hyalinis. 

 Long. 8 millim. 



Hah. Panama, David, Chiriqui (Champion). 



The antennae are not much longer than the thorax, thickish, scarcely tapering towards 

 the apex, fuscous black, covered with a short close pile. The front is considerably 

 raised and bounded by the sutures, which are not very deep ; the posterior part is 

 separated from the ocelli by a deep suture, which, however, is not continuous, there being 

 a ridge in the middle. The lower ocellus is placed in a deep and wide pit ; the frontal 

 area becomes narrower towards the apex, and is prolonged between the antennas into 

 a sharp-pointed keel, which bears the antennal fovea (which is small and indistinct) 

 at its top ; at the bottom its sides spread out, and it is bounded by a transverse 

 furrow situated above the clypeus, which is convex and is truncated at the apex. 

 The mandibles are piceous. The pronotum and mesonotum with the scutellum and 

 upper half of the mesopleuree are red, save the middle lobe of the mesonotum. The 

 tegulse are red. The fore wings are black at the base to the transverse median nervure, 

 and the black cloud is continued along the lower border of the wing ; a broad middle 

 fascia extends from the stigma to the end of the second transverse nervure, the part below 

 the cubital nervure being narrower than the upper, which does not extend much beyond 

 the third transverse cubital nervure. The first transverse cubital nervure is faintly indi- 

 cated at the top, nearly opposite the first recurrent nervure, which would make the first 

 cubital cellule longer than either the second or third, the indication of the first transverse 

 cubital nervure being at a little distance from the base of the stigma ; the third cubital 



