41 



South Texas and Colorado forms, but until more material is avail- 

 able nothing definite can be stated ; it may merely be an aberration of 

 the form texana. 



We have been unable to dissect any specimens of the $ sex, but 

 the 9 genitalia show distinct variation from those of streckeri. The 

 Vaginal Plate (PI. VI, Fig. 6) is generally smaller, the Lateral fold 

 is distinctly divided into an anterior and a posterior portion, the lower 

 ends of the posterior half bending inwards and approaching each other 

 towards the centre of the vaginal plate. The anterior margin of the 

 plate is strongly hollowed out; a spirally wound chitinous fold proceeds 

 from the base of the inner margin of the Alae towards the vaginal 

 opening, but does not reach same ; the Alae are very long, sharply 

 pointed and the two margins do not diverge towards the base as in 

 the form streckeri. 



Habitat. South Texas (Dallas, S. Antonio). 



M. SMiTHi Druce. 



Megathyinns smitlii *Druce, Biol. Cent. Am. Het., II, 320 PI. 69, Fig. 5 (1896) ; 



Mabille, Gen. Insect. Hasp., p. 185 (1904); Skinner Tr. Am. Ent. Soc. 



XXXVII, 205 (iQii). 

 Aegiale smithii Skinner, Syn. Cat. N. Am. Rhop. Suppl. I, Zi (1904). 



"Male — Primaries and secondaries dark brown ; the primaries with a small 

 spot at the end of the cell, three spots beyond it on the costal margin near the 

 apex, and a submarginal row of small spots extending almost to the anal angle, 

 the cell pale yellow, fringe alternately pale yellow and brown; secondaries with 

 a submarginal row of rather indistinct yellow spots e.xtending from near the 

 apex to the anal angle, the fringe white ; the underside of the primaries brown, 

 with the spots as above, but larger and whiter, that of the secondaries brown, 

 broadly bordered with gray from the base to the anal angle, and with two 

 zigzag white lines crossing from the costal to the inner margin ; head, thorax 

 and abdomen dark brown, the underside of the palpi and part of that of the 

 thorax white ; antennae brown above, white beneath, the tip black. Expanse 

 2Yz inches." 



The single specimen before us of this species, a male, was captured 

 at Corpus Christi, Texas, by Dr. Barnes. Sir Geo. Hampson has 

 compared a colored figure of this specimen with Druce's type and the 

 dififerences between the two are so minute as to leave very little doubt 

 as to the identity of the Texan specimen. 



The $ genitalia are entirely dissimilar to those of any other spe- 

 cies in this family. The Uncus (PI. IV, Fig. 15) is deeply bifurcate 

 at its apex, broadening gradually to the base; no lateral incisions are 



