EXPLANATION TO PLATES. 



925 



PLATE XV— Continued. 



Fig. 7. A second section simpler and more theo- 

 retic than the first. 

 8. Diagrammatic. All the elements of the 

 sting have been reduced to pieces of the 

 same form. After Lacaze-Duthiers. 



PLATE XVI. 



Fio. 1. Ohalcophora virginica: ant, antenna; Ibr, 

 labrum; md, mandible ; mx, 1st maxilla; 

 mx', 2d maxilla (labium) ; Ip, labial pal- 

 pus (this lettering the same for the 

 other figures on plates XVI-XXV ; I, 

 pal, labial palpus, enlarged ; «, seta ; ch, 

 chitinous support. 



2. Dicerca divaricata, enlarged about twice j 



6, head and three thoracic segments, 

 seen from beneath. 



3. Unknown larva, sweet gum tree, Houston, 



Tex. ; V, ventral view ; p, prothorax ; 

 in, mesothorax ; m', metathorax. 

 6. Buprestid larva from under hemlock bark ; 



a, natural size; b, head and prothorax 

 from above ; c, the same, drawn from 

 below. 



All the figures and details drawn by Dr. C. F. 

 Gissler. 



PLATE XVII. 



Fig. 1. Elaphidion parallelum : a, from above ; 



b, from beneath ; /, ligula-like process 

 situated behind and not between the 

 labial palpi. 



2. Unknown longicorn larva under bark of 



pin oak, Houston, Tex. ; v, under side. 



3. Criocephalus agrestis: pupa, dorsal view, 



enlarged 2 times. 

 3a. Criocephalus agrestis : pupa, ventxal view. 



4. Melanophila, under bark of spruce ; v s, 



under side of prothoracic disc. (See, 

 also, pi. XXII, fig. 1.) 

 Gissler del. 



PLATE XVIII. 



Fio. 1. Unknown longicorn larva, from under 

 bark of pitch pine, Atlanta, Ga., x 2 

 times ; va, head and five succeeding seg- 

 ments, from beneath ; vb, 4th abdominal 

 segment, from beneath ; vc, 7th abdomi- 

 nal segment, from beneath ; lat, lateral 

 view of head and four succeeding seg- 

 ments, with prothoracic and Ist abdom- 

 inal spiracle ; md, two views of the man- 

 dibles. Length of larva, 37'»"' ; width of 

 prothoracic segment, lO""" ; length of 

 same, 4.5™"; width of mesothoracic, 

 9.5""" ; of 1st abdominal segment, 9°"". 

 Average width, 8.1""". 

 2. Saperda tridentata. Length, IS"""; width 

 of prothoracic segment, S"™ ; v, under 

 side of head and five succeeding seg- 

 ments ; lat, lateral views of the same ; 

 md, three views of the mandibles. 

 All the figures enlarged, and drawn by C.F. 



Gissler, under the author's directions. 



PLATE XIX. 



Fig. 1. Asemum mmstum : v, under side of thora- 

 cic segments, showing the three pairs 

 of legs; with the three succeeding 

 segments; lat, lateral view of head, three 

 thoracic and 1st abdominal segments. 



2. Longicorn larva, under bark of oak, At- 



lanta, Ga. Length IS™"" ; width of pro- 

 thoracic segment 5.2"'°'; ventral view 

 same as dorsal. Body narrowest in the 

 middle; prothoracic segment short and 

 very broad; the elevated areas or cal- 

 losities dark and prominent; antennae 

 long, 4-jointed ; 2d joint much shorter 

 than the first ; 4th joint minute, half as 

 long as the 3d is thick ; labrum rather 

 narrow ; 3 pairs of short, acute thoracic 

 feet. 



3. Longicorn larva, under bark of Pinus stro- 



bus. May 26. Length Hmm; x, two 

 fleshy processes with horny tips, on the 

 median area of tergumof 9th abdominal 

 segment. 



4. Longicorn larva, on sweet gum tree (log), 



Houston, Tex. Length lO""™; e, end of 

 body, showing a curved spine on the 

 dor-al side of the 9th abdominal segment, 

 and on each side of the latter a fleshy 

 process with a terminal bristle. 

 C. F. Gissler del. 



PLATE XX. 



Fig. 1. Orthosoma brunneum; v, under side of 

 three thoracic ( with feet) and first two 

 abdominal segments ; lat, side of head 

 and four succeeding segments showing 

 the feet ; Ibr, labrum and clypeus with 

 front edge of epicranium. 



2. Longicorn larva from sycamore: v, under 



side of the three thoracic and four basal 

 abdominal segments. 



3. Pupa of a longicorn beetle (Oncideres!) 



found under bark of pin oak, April. 

 Length, IS""" ; width of prothorax 4. 4°'"'. 

 Gissler del. 



PLATE XXI. 



Fig. 1. Bhagium Kneatum, dorsal view: v, under 

 side of head and pro- and mesothoracic 

 segments; vms, one of the middle ven- 

 tral segments, magnified six times ; ml, 

 mala of the maxilla. 



2. Bhagium lineatum, vertex, top of head ; 



ep, front of epicranium ; oe, eyes ; cly, 

 clypeus, membraneous on the edge; ch, 

 two chitinous supports of (Ibr) the la- 

 brum ; ml, mala or single lobe of the 

 maxilla ma; ; m,d, mandible. 



3. Longicorn larva from oaklog. Providence, 



May 20. v, under side of thoracic seg- 

 ments, showing the legs; ml, mala of 

 maxilla; mx', labium ; sm, submentam ; 

 m, mentum ; lig, ligula. 



4. Saperda larva from willow. 



Gissler del 



