PHYLLOPHAGA — TENTHREDINIDiE. 17 



SemUventrii in allusion to the form of the abdomen, and Securijera 

 or Seyrifera after the form of the ovipositor)," into four " families" : 



Metathorax (fourth body segment) fissured in the middle at its apex, autennse 

 placed above the clypeus, and above the lower part of the eyes ; anterior 

 wings with at least three cubital cells. 

 Anterior tibise with two spines at the apex ; prothorax small. .Tenthredinidjj. 

 Anterior tibise with one spine at the apex : prothorax large. 



Antennte subclavate ; abdomen compressed ; middle lobe of mesothorax not 



reaching to the scutellum ; tibise .spined ; ovipositor short Cephid.k. 



. Antennte of uniform thickness ; middle lobe of mesothorax rea'-hing to the 

 scutellum and sejtarated from it by a transverse line; ovipositor long. 



SlRICID^. 



Metathorax not fissured ; antennse inserted below the clypeus and the eyes ; an- 

 terior wings with two cubital cells; ovipositor semi-spiral. ...Oryssid*. 



The first " family," Tenthredimdie, is then taken up and divided 

 into the following? " tril)es (or subfamilies) :" 



Prothorax enmrgiiiate l)ehind; middle lobe of mesothorax much longer than 

 broiid, not separated from scutellum by a deep fovea; ba.sal nervure not 



received in first .?nbital cell. Larvae with ventral legs 2. 



Prothorax subtrnncate behind: middle lobe of mesothorax not much longer than 

 broad, and .>>cparated from scutellum by a deep fovea; ba.sjil nervure 

 received in first cubital cell ; tibise spined. Larvte without ventral 



legs .5. 



2. — Anterior lobes of metathorax well developed, so that the cenchri are sejja- 



rated from the scutellum by a comparatively wide space. 3. 



Anterior lobes of metathorax not well developed, cenchri almost touching 



the scutellum 4. 



3. — Anterior wings with two radial cells; second and third cubital cells receiv- 

 ing each a recurrent nervure; lanceolate cell rarely petiolate; anteiinte 

 usually 9-jointed, rarely 7-15 jointed. I^rvse with twenty-two legs. 



Tenthredina. 



Anterior wings with one, rarely with two radial cells ; second (or fii-st when 



there are only three) cubital cell receiving both recurrent nervures; 



lanceolate cell petiolate, rarely constricted; antennae 9-jointed. Larvse 



with twenty legs Nematina. 



4. — Antennae clavate ; sides of abdomen acute. Larvae with twenty-two legs, 



ejecting an acid liquid from lateral pores Cimbicina. 



Antennae 3-jointed; anterior wings with one radial cell, usually appendicu- 



late ; tibia; spined. Larvae with eighteen or twenty !egs..Hylotomina. 



(Antenna' 4-jointed, the third joint the largest ; basal nervure received in the 



first cubital cell; ovipositor exserted Blasticotomina. ) 



Antennae multiarticulate, serrate in 9 , flabellate in % . Larvae with twenty- 

 two legs Lophyrina. 



5. — Antennae setaceous, multiarticulate; abdomen depressed ; ovipositor not ex- 

 serted Lydini 



Antennae 12-jointed, the third very much larger than any of the others ; 

 ovipositor exserted Pinicolina. {=XyeliiHa.) 



TRANS. .VMEU. ENT. SOC. (3) 8UPPL. VOL. 1887. 



