ROLAND HAYWARD. 205 



middle: basal impressions deep: base truncate ; sides slightly arcuate in front, 

 feebly sinuate behind, the margin very narrowly reflexed ; hind angles rectangu- 

 lar, with a very short, fine carina. Elytra slightly elongate, oblong-ovate, 

 slightly wider than the thorax, with a moderately deep, impunctate, sutural 

 stria, which does not attain the base: dorsal punctures small, the first slightly in 

 front of, the second slightly behind, the middle. Body beneath piceous or rufo 

 pieeous. Legs testaceous. Length .07. 10 inch ; 1.75-2.5 mm. 



This species bears considerable resemblance to nebuJosus Chand., 

 but differs essentially by the absence of the three large punctures at 

 the middle of the posterior transverse impression of the thorax 

 (Plate VI, fig. 10) and by its less robust form. Great variation in 

 color is shown in a large series, and the markings of the elytra, 

 although always ill-defined, vary in distinctness. Rarely they are 

 almost completely wanting. In a few specimens examined, very 

 faint traces of a second stria are discernable. 



It is frequently found in ants' nests, although far from strictly 

 myrmecophilous in its habits. All that I have seen thus collected 

 were taken in the nests of Formica exseetoides Fovel. 



It has a very wide range of distribution, extending from Canada 

 and the New England States southward to Florida and Texas and 

 westward to the Pacific coast, specimens having been seen from 

 British Columbia, Washington and Oregon. 



8. T. (lolosus Lee. — Form very elongate, slightly convex. Color testaceous 

 or pale rufous, shining. Head as wide as the thorax at apex ; eyes large, promi- 

 nent ; antennae less than one-half the length of the body, testaceous, the outer 

 joints scarcely darker; palpi testaceous. Prothorax quadrate, about one-half 

 wider than long, slightly wider at base than apex; apex truncate: median line 

 fine, abbreviated at each end ; anterior transverse impression obsolete, the poste- 

 rior deep, finely punctate, not tripunctate at middle; basal impressions small, 

 moderately deep : Wise truncate ; sides with the margin very narrowly reflexed, 

 slightly rounded in front, feebly sinuate behind ; hind angles rectangular, very 

 finely carinate. Elytra elongate, oblong-elliptical, nearly one-half wider than 

 the thorax, with a deep, impunctate, sutural stria, which does not attain the base, 

 the other dorsal striae obsolete; dorsal punctures small, the first slightly in front 

 of. the second slightly behind, the middle. Body beneath pale rufous. Legs tes- 

 taceous. Length .09-. 11 inch; 2.25-2.75 mm. 



Most closely allied to ineurvus, but distinct by its much more 

 elongate form and uniform pale color. 



It occurs in the Eastern and Southern States, Iowa, Missouri, 

 Kansas, Texas, Colorado, New Mexico and Arizona. 



9. T. rapax Lee. — Form elongate, moderately convex. Color rufous or rufo- 

 testaceous, shining. Head as wide as the thorax at apex ; eyes large, prominent; 

 antennae less than one-half as long as the body, pale fuscous, testaceous at base; 



TRANS. AM. ENT. SOC. XXVI. JANUARY, ]900. 



