262 CALIFORNIA ACADEMY OF SCIENCES. 



Engycystis* gen. nov. 



Plate xxi, fig. i, female; fig. 2, head from front; fig, 

 3, abdomen of S ; fig. 4, hind leg of $ ; fig. 5, fore leg 

 of same. 



Form elongate, slender in both sexes. Eyes tolerably 

 large, reaching the base of mandibles, «o^ emargmate in 

 either sex. Mandibles armed internally with a strong 

 tooth betzveen middle and apex. Ocelli distinct. Insertions 

 of antennae protected by a prominent lobe, the distance 

 between the insertions less than that between them and 

 the eye margin. Antennae rather long and slender, taper- 

 ing to apex, in length about equal to the thorax, joints 

 long and easily distinguished, 12 in $ , 13 in 5 . Max- 

 illary palpi 5-, labial palpi /^-Jointed, the joints of the 

 former unusually long and slender, of the later short and 

 stout. Thorax elongate-oblong, narrower than head. 

 Pronotum much longer than dorsulum and shorter than 

 middle-segment, the dorsulum small, if anything, shorter 

 than scutellum, the latter somewhat narrowed posteriorly 

 and longer than broad. Mesopleurge ridged anteriorly y 

 and beneath separated from the mesosterum by an indis- 

 tinct furrow. Metapleurae less deeply sunken than in 

 Myzine. Middle-segment in the only known species 

 coarsely rugose or rugoso-reticulate. Legs slender in 

 both sexes, the femora and tibige not fattened or broadened. 

 Hind femora at apex beneath produced into a rather sharp 

 tooth. Fore tibise with one, medial and hind pair with two 

 spurs, the hind pair being also strongly serrated in the $ , 

 less strongly in 5 , and with the tarsi well spined. Anterior 

 metatarsus with a feeble comb, composed of short, straight 

 spines. Middle cox« a little separated. Abdomen about 

 as in 6 Myzine, but not so strongly constricted at base 

 and apex of the segments. Last dorsal segment of ? 



* iyyu'} = close by + y-Ofrriq = cell. 



