96 THE CANADIAN ENTOMOLOGIST. 



Erigonince. 



These are smaller species, the abdomen not very much larger than the 

 cephalothorax, and a little elongated. The legs are shorter than in the 

 Theridmx, and the male palpal organ has a tarsal hook ; the epigynum 

 not projecting, the legs without long spines, head of male often curiously 

 modified. 



LingpJiiiKz. 



These have longer legs than the preceding, and they are more spiny ; 

 the epigynum often projects. They are more usually marked than the 

 Erig07iince, and are generally larger. 



Family i8, Epeiridcz. 



This includes the common orb-weaving spiders ; a few other genera 

 are included — Fachygnatha, Glenognatha, Belli7ida and Mimetus. They 

 are very similar to the Theridince, but have a low clypeus. Three sub- 

 families may be recognized. 



I Body with spine-like projections Gasteracanthin(z 



\ Body without such projections, at most with two basal humps 2 



( Male mandibles large, body elongate ^ Tetragnathince 



I Mandibles small, body shorter Epeirince 



These sub-families, like those of the Theridiidce, also intergrade. 

 Family 19, Uloboridce. 



Related to the Epeiridce by their habit of building orb-webs, but their 

 structure quite distinct. We have but two genera, Uloborus and Hyptiotes. 



Section V. — This includes the Laterigrada? of authors. The body is 

 flattened, the first two pairs of legs long, the abdomen short and roundish. 



Family 20, Thoniisidce. 



These are frequently found upon flowers and fences waiting the 



approach of some insect. There are a great number of cases of protective 



resemblance in the group. They walk most easily sideways, and many 



throw off their legs very readily. 



/ Two front pairs of legs much larger and longer than the others, no 



1 scopula = Thomis'mce 



\ Two front pairs of legs not larger than the others, a scopula present. 

 (^ ..Philodromince 



Family 21, Sparassidce. 



These resemble the Philodrommce of the preceding family. They 

 occur in the south and southwestern parts of the U. S. 



