44 



The species is evidently most common in the Upper Austral life 

 zone, although it extends into what is considered Transition. The 

 fact that it ranges throughout the Upper Austral zone from ocean to 

 ocean is another link in the chain of evidence of its being an introduced 

 species. 



DESCRIPTIONS OF THE EARLIER STAGES. 



The egg. — The egg is of rather large size as compared to the beetle, 

 and extremely irregular in outline. Of ten eggs examined, two were 

 broadly oval and two were subpyriform, the remainder being elliptical 

 oval. The color is clear, nearly transparent gray, and there is no 

 visible sculpture, the surface being highly polished. The consistency 

 is fairly firm. The length varies from 0.65 to 0.85 mm. and the width 

 from 0.35 to 0.45 mm. 



The larva. — The larva is elongate cylindrical, when full grown 

 measuring about four times its greatest diameter. In color it is milk 

 white, with pale brown head. Its body is much less curved than is 

 usual in the Rhynchophora, the curvature when in natural resting 

 position being about as shown in the illustration (fig. 12, c). It tapers 

 abruptly and about equally at each end, the small head being of about 

 the same width as the anal segment. Segmentation is quite pro- 

 nounced at the sides as viewed from above, moderately on the venter 

 as viewed from the side and feebly on the dorsum. The surface is 

 feebly wrinkled as compared with many rhynchophorous larvae. The 

 transverse lines and ridges of the dorsal and lateral surfaces are fine 

 and straight. Alternating with these there are transverse rows of 

 minute rounded tubercles, some of them piliferous, the hairs arising 

 from them being extremely fine and short, so fine, indeed, as not to 

 be visible under an ordinary hand lens. The head (d) is nearly circular 

 in outline, pale yellow in color, Avith brown mandibles. The V-space 

 and temporal suture are rather faintly defined. The mandibles are 

 bidentate and the surface carries a few fine short hairs like those on 

 the body. This larva has no appearance of leg pads as are to be 

 found in many Rhynchophora. 



The length, curved as in the illustration, is about 5 mm. , and when 

 extended 6 mm., the width being about 1.3 to 1.4 mm. 



Thepupa. — The pupa with its snout bent downward between the 

 forelegs on the under surface of the ^ody is at once recognizable as a 

 Curculionid. Its color is pure milk-wmite, like the larva. The knees 

 head, thorax, and anal segments are tufted with short bristle-like seta 3 . 

 These are very short and minute, much shorter than in Conotrachelus, 

 and arranged in pairs except on the thorax, where there are many. 

 There does not appear to be any at the sides of the abdominal segments 

 as in Conotrachelus. The length is about 4.5 niin.; the greatest width 

 about half that. 



