150 THE CANADIAN ENTOMOLOGIST. 



ages black, long, very asymmetrical ; the right with the basal joint very 

 broad, nearly quadrate ; the left slender, and fully twice as long ; a slender 

 process with piceous apex from the base of the right appendage ; ventrally 

 is a large triangular projection of the last segment, concave above ; wings 

 dark smoky fuscous, with four very narrow longitudinal lines ; 4-5 pale 

 costal veinlets and three between the radius and the upper branch of the 

 sector. 



A well-grown larva is 12 mill, long; antennae much shorter than in 

 the imago ; lurid-fuscous, the posterior portion of the head, the whole 

 prothorax and legs more or less testaceous ; underside pale ; appendages 

 with just the same asymmetry as in the imago. A starved nymph 9 mill, 

 long ; colors similar to those of the larva ; legs more slender, asymmetry of 

 caudal appendages less striking ; rudimentary wings with evident neura- 

 tion ; fore wings reaching the base of metanotum ; hind wings the apex 

 of 2nd dorsal segment ; the nymph when living was at least one-third 

 longer. Hab. Among plants of Saccolobimii retusicm from East India in 

 hothouses. 



The three stages are described after single specimens. The 

 color of the larva reminds strongly of the specimens from 

 Borneo, described before as O. Sawidcrsii. The figure of the 

 nymph in the Gardener's Chronicle complicates things more. 

 The hind wings cover only the anterior half of the metathorax, therefore 

 the specimen was much younger than those described by McLachlan, in 

 which the hind wings reached the apex of the second abdominal segment. 

 Nevertheless the size marked in the Gardener's Chronicle is 16 mill., 

 though McLachlan's when living, was only 12 mill. The figure (Gard. 

 Chr.) shows on the hind part of the head and thorax spots and patches 

 similar to those in Sialis and Corydalis. Mr. Wood-Mason speaks in sev- 

 eral places of 0. Michaeli as if he knows this species, and finally described 

 and figured (only the abdomen from below) O. Michaeli. Nevertheless 

 his paper does not allow conclusions with certainty. The black male men- 

 tioned by him can only with doubt be 'united with 0. Michaeli., as he does 

 not mention the yellow apex of the antennae ; in fact he has not named it 

 at all. The female, of which I possess a specimen, seems rather gigantic 

 compared with the described male, so that I had provisionally described 

 it as O. valida. But as McLachlan (Zool. Rec, 1883, p. 259) by the 

 words in brackets, "apparently O. Michaeli McLachl," accepts this 

 determination, I have followed him not to encumber synonymy. 



