242 AGRICULTURAL EXPERIMENT STATION. 



habits I know only that it does bite, that the pain is sHght as com- 

 pared with that of cantator, which it resembles so closely that the 

 two have been supposed to be the same species. There seems to 

 be only one brood. 



Description of the Larva. 



The larva and its parts are figured on plate fig. 72. The larva 

 when full grown is from 9 to 10 mm., or .36 to .40 of an inch in 

 length, excluding the anal siphon, is of rather stout build and 

 usually dirty slate gray in color except the head, which is yellow- 

 ish brown. The head is one and one-half times as broad as long 

 aod immaculate except for a faint cloud which is usually present 

 on the vertex. From the center of the head arise two small hair 

 tufts of two hairs each and a single, short hair in advance of each ; 

 another tuft of five or six hairs is at the base of each antenna. 

 The antenna (fig. "^2, 3) is yellowish at the base, becoming dark 

 brown toward the tip ; it is rather short, with a slight curve, and 

 is swollen for one-fourth its length from the base, then evenly 

 tapered to the apex ; the apex with four spines, a long and a short 

 slender one, two short stout ones and a little short articulated 

 joint. The tuft is situated on the shaft slightly below the middle 

 and consists of six or eight hairs which do not reach the tip. The 

 surface is sparsely set with moderate spines and numerous small 

 ones arranged in rows. Eyes rather small, sometimes with a 

 small posterior portion separated from the rest. The hairs of the 

 rotary mouth brushes (fig. 72, 2) are numerous and heavily pec- 

 tinated, especially centrally. The mentum (fig. 72, 6) has from 

 nine to thirteen teeth on each side of the apex, is triangular in 

 form, with the toothed edges only slightly curved. The mandi- 

 ble (fig. y2, 4) is normal and the maxillary palpus (fig. y2, 5) 

 is oval with a moderate sized tuft of long hair at the apex, hair 

 patches on its surface as usual and the basal joint large with 

 small spines at the apex. 



The thorax is angulated, one and one-half times as broad as 

 long, the lateral angles with tufts of long hairs arising from tuber- 

 cles and the anterior margin with two very small tufts of two or 

 three hairs each. 



The abdominal segments from one to seven are subquadrate in 

 form, with four or five lateral hairs on the first and second seg- 

 ments, two hairs each on segments three to six inclusive, and the 

 seventh and eighth segments with short tufts only. The lateral 

 combs. of the eighth segment have from twenty-six to fifty scales, 

 each arranged in a patch without regularity. The lateral spines 



