86 GEO. H. HORN, M. D. 



precedes. Maxillary palpi with third joint rather stoutly fusiform, 

 fourth small, subuliform. Mesosternum slightly concave (not carinate), 

 receiving the anterior coxa; when contracted; middle coxae rather 

 widely distant. Epipleurse narrow, horizontal, elytra not projecting 

 downwards beyond the body. Tarsi four-jointed. l\«terior coxae not 

 connate with the metasteruum, articular plate small not covering the 

 femora. Head broad, eyes moderately prominent and coarsely granu- 

 lated. Scutellum concealed. Body capable of contraction but not to 

 the extent of Liodcf.^ etc. 



From the above description it will be inferred that several of the 

 most important characters of the genus have been overlooked. The 

 rather widely separated middle coxse and the slightly concave meso- 

 sternum without carina seem to be very important characters and give 

 the species of this genus their power of contractility. The posterior 

 coxae preserve the general characteristics of the tribe, there is the 

 usual expansion partially concealing two abdominal segments and at- 

 taining the metasternal side-pieces, the articular plate is small, not 

 concealing the trochanter and a part of the femur. The articulatioa 

 between the coxre and the metasteruum is free. 



Two species occur in our fauna: 



Legs and an ten use palo testaceous Ziogleri. 



Legs piceous, outer joints of antennae piceous 4^^i*OtcIiii. 



H. Ziegleri, Lee. — Black, moderately shining, margin of thorax nr.r- 

 rowly i)ellucid, legs and antennae testaceous, surface sparsely clothed with 

 greyish pubescence. Head very minutely and sparsely punctulate. Thorax 

 nearly three times as wide as long, narrower in front, base broadly arcuate, 

 surface sparsely minutely punctulate, sides near base narrowly pellucid, hind 

 angles sub-rectangular. Elytra each one wider than long, convex, sparsely 

 punctured and pubescent. Abdomen S])arsely punctured and pubescent. Body 

 beneath very finely and sparsely punctulate. Legs pale testaceous. 



Mule. — Sixth ventral deeply triangularly notched, (Erichs.). 



Female, — Segments simple. 



The unique female before me was found in Pennsylvania by Mr. 

 Ziegler. In its contracted state it measures nearly .04 inch; 1 mm. 

 It agrees so accurately with the descriptions of /onfjfconu'a that I have 

 doubts of its being distinct. Comparison will be made hereafter. 



H. Crotcliii, u. sp. 



Resembles the preceding in most of the characters and differs as 

 follows: Antennjc longer, joints three to seven especially, longer than 

 the preceding species, joints eight to ten also more elongate and more 

 distant, color testaceous at base gradually darker to tip. Legs piceous. 

 Hind angles of thorax obtusely rounded. Elytra more distinctly 

 punctured. Length .04 inch; 1 mm. 



