NEMATUS SALICIS. 163 



78. NEMATUS SALICIS. 



Vol. I, PI. VII, fig. 9, Larva, after Brischke; Vol. II, 

 PL XXIV, fig. 5, Saw. 



Tenthredo solids, Lin., S. N., 927 ; Ratz., Forst., iii, 125, 31, 



pi. iii, f. 5. 



caprece, Fab., S. P., 40, 52. 

 Nematus salicis, Lep., F. Fr., pi. 11, f. 3; Mon., 68, 203; Ste., 



111., vii, 31; Htg, Blattw., 194, 20; 



Brischke, Beschr., 6, pi. 1, f. 2 (lar.); 



Toll., Tijd. Ent., v, 6064. pi. 3; 



Thorns., Opus. Ent., 634, 43; Kalt. 



PfL, 573; Br. and Zad., Schr. Ges. 



Konig., xvi, pi. 5, f. 12 (lar.), 1. c., 



xxiv, 315 ; Andre, Species, i, 220 ; 



Cat., 23,* 171. 

 inflatus, Thorns., Hym. Scand., i, 139, 69. 



Luteous ; a large mark on the vertex, one across the breast, meso- 

 notum, scutellum, basal half of metanotum, and the antennae, black. 

 Antenna} a little shorter than the body, moderately thick at base, 

 decreasing considerably in thickness towards the apex ; slightly pilose, 

 the third joint a very little shorter than the fourth. Head narrower 

 than the thorax, sparsely covered with short pile, the pentagonal area 

 very distinct, frontal sutures well marked, eyes small, oval, clypeus 

 deeply notched, forehead glabrous, apex of the mandibles piceous; 

 palpi pale yellow. Thorax smooth, shining, shortly pilose; cenchri 

 large, dull white. Abdomen large, inflated, cerci short, sheath black, 

 pilose, slightly exserted. Wings hyaline with a yellowish tinge, the 

 nervures, costa, and stigma black ; the cpsta at the base and the tegulae 

 yellowish ; the third cubital cellule is one-fourth longer than the 

 second, which has a horny dot at its apex ; the second recurrent nervure 

 is nearly joined to the second transverse cubital. The posterior tarsi 

 are shorter than the tibiae, black, the apex of the tibise being also of 

 this colour; the spurs are short, and the patella} are well developed. 



The has the antennae longer and thinner, the black marks on the 

 head and thorax larger, the posterior tarsi reddish. 



Length 5^ 6 lines. 



Ab. a. Antennse underneath brown. 

 b. Breast immaculate. 



This well-known insect is readily distinguished by the 

 large inflated yellow abdomen, black mesonotum and 

 vertex, as also by the black costa and stigma, and the 

 nearly interstitial second recurrent nervure. 



The larva when fully grown is one inch, if not more, 



