;276 Annals Entomological Society of America [Vol. XIII, 



impracticable. The Bermudan form is more robust, having 

 a width of 4 mm. as against 3 mm., the legs are brick-red instead 

 of lurid, and the pale border of the anal tergite is narrower. 

 More important, the anal tergite of consociatus is said, in Pocock's 

 key (Jour. Linn. Soc, 1893, 24, p. 487, etc.) to be produced, 

 though scarcely exceeding the valves. It is not caudate in 

 the present form. 



SPIROBOLELLID^. 



Microspirobolus excursans sp. nov. 



Body in general of a light brown color with dorsum showing a 

 tendency toward a weakly reddish tinge. Typically a darker brown 

 band along each side at level of pores embracing a series of black spots 

 formed by the repugnatorial glands which are always conspicuous. A 

 rather faint middorsal dark line. Each ordinary segment crossed above 

 by a pale band at or in front of the constriction, this bending back at 

 middle where divided by middorsal dark line, sometimes embracing 

 most of prozonite. Legs pale brown or fulvous. Collum without dark 

 markings. Anal segment also light, or sometimes more or less dusky. 



Head smooth. A fine sulcus across vertex, ending in a small 

 impressed foveola at upper level of eyes. Clypeal setigerous foveolse 

 4+4, the two outermost on each side more widely removed. Eyes 

 subtriangular with apex toward base of antenna and the sides rounded. 

 Ocelli distinct, about thirty-one in number, arranged typically in five 

 rather irregular, subvertical series, e. g., 5, 6, 7, 9, 4. Antennae very 

 short, gradually enlarged to sixth joint, fitting in a groove in head and 

 mandible on each side. 



Collum projecting forward over base of head. Widely rounded 

 below, the anterior corner subrectangularly rounded, the posterior more 

 oblique, the lower edge somewhat flattened or even slightly indented. 

 Margined below and up front as far as level of eyes, otherwise non- 

 striate and smooth. 



The following segments each have the metazonite obviously con- 

 siderably elevated above level of prozonite, the segment more or less 

 constricted or furrowed about middle, especially laterally. Pore well 

 removed back of furrow, lying half way to the caudal edge from the 

 furrow. Deeply longitudinally striate beneath; laterally with curved 

 striae on prozonite in and just back of furrow up to level of pore and 

 fewer more straight striae in corresponding place on metazonite. Dorsally 

 the prozonite is characteristically marked with a network of impressed 

 lines, outlining hexagonal areas, the areas decreasing in size forward 

 from furrow. Metazonite wholly smooth dorsally. 



Anal tergite rounded behind, not at all projecting beyond valves. 

 Anal scale transversely narrowly elongate, the caudal edge nearly 

 straight. 



Number of segments, thirty-five to forty, mostly thirty-seven or 

 thirty-eight. 



Length, near 18 mm.; width, to 2 mm. Male more slender than 

 female. 



