54 The West American Scientist. 



THE PEACH AND APRICOT BORER OF SOUTHERN 



NEW MEXICO. 



By C. H. Tyler Townsend. 



This borer has been referred to by the writer, first in the 

 Rio Grande Republican (of Las Cruces, N. Mex.) for April 24, 

 1 89 1, under the name of ^Egeria exitiosa; and second in Bulletin 

 3 of the N. Mex. Agricultural Experiment Station, pp. 13-15, 

 published in June, 1891, where it is called Sannina exitiosa. 



As it is by no means certain that this borer is S. exitiosa, 

 since it has never been bred, I present the following description 

 of the larva, which will enable its identification at some future 

 time. Sannina pacifica Riley bores the peach in California, and 

 it is probable that our species is either this or S. exitiosa. But 

 it is possible again that it may be another species. It seems to 

 be less hairy than the larva of S. exitiosa, according to Harris' 

 figure. 



Description of larva. Length, 12 to 13 mm. Whitish, head 

 reddish brown. Broadest anteriorly, gradually narrowing to 

 anal extremity. Head corneous, slightly narrower than next 

 segment, semicircular in outline from above, with a dorsal Y 

 formed by two depressed lines meeting behind, the Y being open 

 anteriorly. Two bristles, one behind the other, on each prong 

 of the Y anteriorly. A transverse row of four short bristles just 

 anterior to where the Y forks, the inner ones shortest. Front 

 border of head, and ends of mandibles, blackish. Antennae 2- 

 jointed, short, joints cylindrical, first joint twice as wide and 

 twice as long as second, the second terminated by a bristly 

 style. Four (in one case 5) small black dots on outer edge of 

 head on each side just posterior to antennae, representing the 

 eyes, with two (in one case one) ventrad and at base of antenna 

 below edge. Four bristles, two long and two short, in this 

 region posterior to antennae on edge of head, not connected with 

 the black dots. A pair of short bristles a little dorsad of anten- 

 na. Two bristles on underside below the dots at edge of head. 

 Mandibles 3 or 4-toothed, the fourth tooth not so distinct as the 

 anterior three. Maxillae 3-jointed, if the two larger and longer 

 solerites at the base of each be excepted; first joint hardly longer 



