Jane, 1903.] MacGiLLIVRAY : WlXDIXG ElBOW-PINS. 99 



Scutellum cupuliform as in the Figitid genus Eucolia; mesonotum without furrows. 



Coelopelta Ashmead. 



26. Scutellum convex or cushion -shaped 27 



Scutellum quite flat or almost subconvex. 



Mesonotal furrows distinct; antennae verticellate AmitUS Ilaldenian. 



Mesonotal furrows wanting or distinct ; antennx lo-jointed, not verticillate 

 subclavate Anopedlas Fdrster. 



27. ScutelUim without a tuft of hairs at apex 28 



Scutellum with a tuft of hairs at apex. 



Lateral ocelli away from the left margin ; club of antennre 6-jointed, the first 

 funicle joint small, the second large, much longer than thick, the third 

 shorter; parapsidal furrows complete Trichacis forster. 



28. Lateral margins of abdomen normal 29 



Lateral margins of abdomen broadly deflexed. 



Lateral ocelli nearer to the eye margin than to the front ocellus ; club of 

 antennce 4- or 5-jointed, the first joint smallest ; parapsidal furrows want- 

 ing or incomplete Hy pocampsis Fdrster. 



29. Thorax not short, more elongate ; scutellum not separated from the mesonotum 



by a deep furrow; mesonotal furrows distinct, rarely incomplete 30 



Thorax short ; scutellum pillow-shaped or highly convex, separated from the 

 mesonotum by a deep furrow ; mesonotal furrows variable, more rarely dis- 

 tinct or complete, sometimes wanting. 

 Face with a sharp keel between the antennce ; third joint of antennre strongly 



dilated Eritrissomerus Ashmead. 



Face without a sharp keel between the antenuLV Polygnotus Forster. 



30. Lateral ocelli nearer the eye margin than to the front ocellus. 



Platygaster LotreiUe. 

 Lateral ocelli nearer the front ocellus than to the eye margin. ..Isocybus Forster. 



WINDING ELBO^A^-PINS. 



Alex. D. AL\cGillivrav. 



Elbow-pins are useful for mounting minute insects of many kinds, 

 as Diptera, Hemiptera, Homoptera and Hymenoptera. They are 

 much firmer and neater appearing mounts than those made with 

 blotting-paper, bristol-board, cork or pith. Elbow-pins are not 

 listed by dealers in entomological supplies, and any tools that will 

 simplify the making of them are worthy of being noticed. 



The apparatus described below was devised by Mr. J. O. Martin 

 while a student in the entomological laboratory of Cornell University. 

 It consists of two separate pieces, one for winding the coils t,c, and the 

 other for placing the coils on the pins. 



