18 Injurious and Beneficial Insects. 



body is slightly hairy, with a few fine, pale hairs on the top of 

 the segment next behind the head. The basal portion of the 

 head (epicranium) is broad and smooth, with a few hairs on 

 the edge. The eyes are two small black dots, each situated a 

 little behind the base of the antennae, and in a line with them. 

 The frontal piece (clypeus) is very small, about three times as 

 broad as long, while the minute upper lip (labrum) is two- 

 thirds as long as broad ; they together form a somewhat trian- 

 gular portion resting on the inner edge of the mandibles, which 

 are broad and short, the ends broad and square, and blackish in 

 color. The antennee are not quite so large or as long as the 

 maxillary palpi ; they are four-jointed ; the first joint being 

 thick, the third joint a third shorter than the third, while the 

 fourth joint is filiform, and about as long as the second joint. 

 The under side of the head is chitinous, with a mesial subtrian- 

 gular fleshy area. The chin (mentum) is square, not much 

 longer than broad. The under lip (labium) is one half as long 

 as broad. The labial palpi are three-jointed, the basal joint 

 being one-half as long as the second ; the third joint is minute, 

 short and hairy. The maxillary palpi are four-jointed, the 

 first joint being twice as thick as the third, the second and third 

 are of nearly equal length, while the fourth is slender and 

 nearly as long as the second or third. The maxillary lobe is 

 large and broad, reaching out to the labial palpi and as far as 

 the end of the third joint of the maxillary palpi ; there are a 

 few hairs on the end of it. 



On the upper side of the segments behind the prothoracic is 

 a faint, transverse impressed line, with two or three short 

 creases radiating from each end. On the eighth, ninth and 

 tenth rings these creases become much longer and are parallel 

 to the median line of the body, while the transverse crease dis- 

 appears. 



There are nine pairs of stigmata, one pair on the mesothorax, 

 the remainder on the first eight abdominal segments. There 

 are three pairs of rudimentary thoracic feet, represented by very 

 minute two jointed tubercles, the basal joint consisting of a 

 simple chitinous ring. The under side of the body is more 

 hairy than above. On tlio under side of the protlioracic seg- 

 ment is a pair of round, smooth, very slightly chitinous spots, 



